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1·At the end of the first trimester, the fetus is about three inches long.

在怀孕的第三个月末，胎儿差不多有三英寸长了。《柯林斯英汉双解大词典》

2·Especially during the final trimester.

特别是在怀孕终期。

3·See your eye doctor within the first trimester of pregnancy.

在怀孕的前三个月要去看眼科医生。

4·The effect in the second trimester of pregnancy was most marked.

在怀孕的第4-6个月时影响最为显著。

5·I love sleep and I love my bed, but both deserted me in the third trimester.

我喜欢睡觉，我爱我的床，但在后期的时候他们都遗弃了我。

6·As you enter the third trimester, you’ve probably gained at least 15 to 20 pounds.

当你进入怀孕后期时，你可能已经增重了15--20磅。

7·During the second trimester of pregnancy, you will gain around 1 to 2 pounds per week.

在怀孕第二阶段，每周你会重个1到2磅。

8·Now that you’ve reached the end of the first trimester it’s fairly safe to spread the news.

既然你已经到了怀孕前期的末期，现在公布消息就相当安全了。

9·Congratulations! By the end of this week you'll have reached the end of the first trimester.

恭喜哦！到这周结束的时候，你也撑到了怀孕前期的末尾。

10·The first trimester is an important time in your pregnancy, especially in terms of nutrition.

妊娠初期，尤其是在营养方面，对孕妇来说是非常重要的。

(1)first trimester早期妊娠

(1)third trimester晚期妊娠