opportunity/chance/occasion/time.导航词义：机会

1. opportunity:n. 机会，时机.指能够做某事或容易做成某事的机会，作此义解时常可与 chance 换用；也可指得到工作或提升的机会。

They had no opportunity/chance to escape.

他们没有逃跑的机会。

He has got the opportunity/chance to visit Paris.

他获得了访问巴黎的机会。

There were more opportunities for graduates last year.

对去年的毕业生而言，就业机会要多一些。

2. chance:n. 机会，机遇.指做想做之事的适当时机，侧重指偶然或意外的机会。

It was his only chance of escape.

这是他唯一的逃脱机会。

I never miss a chance to play football.

我从不错过任何踢足球的机会。

He will be a candidate in next week's election, and this is his big chance.

他将是下周竞选的候选人，这是他成功的大好机会。

3. occasion:n. 时机，机会.指合适的机会或有利的时机，通常用单数，常后接介词 for。

This is an occasion for the whole country to celebrate.

这是个举国欢庆的时刻。

It was the occasion for expressing friendship by the two presidents.

这是两位总统表达友谊的时机。

4. time:n. （可利用的）时间.指能够用来做某事的一段时间，多用于口语。

Now is the right time for us to move to New York.

现在正是我们搬到纽约去的好时机。

I'll visit her if I have time.

如果有时间我会去拜访她。

This is no time to switch jobs.

现在不是换工作的时候。

全部

1·He was improperly dressed for the occasion.

他的衣着不大适合这个场合。《牛津词典》

2·They were unsuitably dressed for the occasion.

他们的穿着在那种场合很不得体。《牛津词典》

3·How can anyone look sad at an occasion like this?

在像这样的一个场合怎么会有人看上去悲伤呢？《柯林斯英汉双解大词典》

4·He used the occasion to announce further tax cuts.

他利用这个机会宣布再次减税。《牛津词典》

5·It is an occasion for all the family to celebrate.

那是个全家庆祝的机会。《柯林斯英汉双解大词典》

6·Hundreds of thousands of people took to the streets to mark the occasion.

数十万人走上了街头纪念这一时刻。《柯林斯英汉双解大词典》

7·Foreign visitors help to give a truly international flavour to the occasion.

外国客人使这个场合显出一种真正国际性的气氛。《牛津词典》

8·Many view these meetings as an occasion to share ideas and refresh friendship.

很多人把这些聚会看作是交流思想、重叙友情的机会。《柯林斯英汉双解大词典》

9·It should have been an occasion for rejoicing, but she could not feel any real joy.

原本应该是高兴的时刻，她却丝毫未感到快乐。《牛津词典》

10·It's best not to try a new recipe for the first time on such an important occasion.

在这样的重要场合，最好不要首次试用新的食谱。《柯林斯英汉双解大词典》

场合

1·He was improperly dressed for the occasion.

他的衣着不大适合这个场合。《牛津词典》

2·They were unsuitably dressed for the occasion.

他们的穿着在那种场合很不得体。《牛津词典》

3·How can anyone look sad at an occasion like this?

在像这样的一个场合怎么会有人看上去悲伤呢？《柯林斯英汉双解大词典》

4·Foreign visitors help to give a truly international flavour to the occasion.

外国客人使这个场合显出一种真正国际性的气氛。《牛津词典》

5·It's best not to try a new recipe for the first time on such an important occasion.

在这样的重要场合，最好不要首次试用新的食谱。《柯林斯英汉双解大词典》

机会

1·He used the occasion to announce further tax cuts.

他利用这个机会宣布再次减税。《牛津词典》

2·Many view these meetings as an occasion to share ideas and refresh friendship.

很多人把这些聚会看作是交流思想、重叙友情的机会。《柯林斯英汉双解大词典》

3·Over the next few years many people had occasion to reflect on the truth of his warnings.

在随后的几年里许多人有机会反思他那些警告的真相。《柯林斯英汉双解大词典》

4·I have no occasion to see him these days.

这些天我都没有机会见到他。

5·He who is disposed for mischief will never want occasion.

存心要使坏，不怕没机会。《新英汉大辞典》

时机

1·How much you are paid reflects how important you are to the company, and you'd better wait for the right occasion to ask for an increase.

你的薪水反映了你对公司的重要性，你最好等到合适的时机再要求加薪。

2·It is clearer all the time that, if you are going to do anything, you must make an occasion to do it, and then you are obviously a troublemaker.

很明显，在所有时候，如果你要做任何事，你得创造出一个时机来做，而那样做你会很显然是个找麻烦的人。

3·I always thought I could rise to any occasion, stand the most withering fire, and do two or three jobs at once.

我总以为自己能够抓住任何时机，能够承受最严酷的考验，并且能够同时开展两件或三件工作。

4·Anniversaries are a chance to be romantic and to remind her that you're still capable of sweeping her off her feet should the occasion arise.

这还是个表现浪漫的好机会，而且你还能让她知道当时机来临，你仍然能令她神魂颠倒。

5·This year marks the 35th anniversary of China-EU diplomatic relations, and it is highly significant to hold a China-EU cultural forum, the very first of its kind on such an important occasion.

今年是中国与欧盟建交35周年，中欧双方借此重要时机首次举办文化论坛，很有意义。

场面

1·Her presence lent the occasion a certain dignity.

她的出席使那场面增添了几分光彩。《牛津词典》

2·The presence of the prince added lustre to the occasion.

王子的出现给那场面增添了光彩。《牛津词典》

3·Pictures of the occasion were placarded throughout Eastern Europe.

这个场面的照片张贴在东欧各处。

4·On one dramatic occasion even Bull Connor's men were shaken.

此间有一个戏剧化的场面，连公牛康纳的子弟兵们都震惊了。

5·This is a grand occasion.

这是个盛大的场面。

理由

1·When one is as handsome as you, said the collar, that is occasion enough.

衬衫领子说：“一个像你这样美丽的人，理由就足够了。”

2·If it was not allowable for him to gain my affections, because I had no money, what occasion could there be for making love to a girl whom he did not care about, and who was equally poor?

要是说，他不愿意跟我相爱，就是因为我没有钱，那么，他一向不关心的一个姑娘，一个同样穷的姑娘，他又有什么理由要去跟她谈恋爱呢？

3·If you ask your boss for leave of absence from the office on some legitimate occasion his love of power will derive more satisfaction from refusal than from consent.

如果你有合理地理由向老板销假，拒绝你比答应你更能满足他地权力欲。

4·There is no occasion to be angry.

没有生气的理由。

5·If you ask your boss for leave of absence from the office on some legitimate occasion, his love of power will derive more satisfaction from refusal than from consent.

如果你有合理的理由向老板请假，拒绝你比答应你更能满足他的权力欲。

(1)on the occasion在那时；值此…之际

(1)special occasion特别的时刻；特别的场合

(1)on the occasion of值此…之际

(1)on occasion有时；偶尔

(1)on this occasionadj. 这一次

(1)on one occasionadj. 有一次；曾经， 有一个时候