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1·School trips give children firsthand experience not available in the classroom.

学校组织的旅行可以给孩子们提供教室里学不到的亲身体验。《柯林斯英汉双解大词典》

2·She sailed for Europe as an accredited correspondent for Life for a firsthand look at the war.

她作为《生活》杂志的特派记者前往欧洲，亲眼目睹了这场战争。

3·Michael Zhao has seen the damage firsthand.

迈克尔·赵是发现这种危害的第一人。

4·She knew firsthand how hard it was to mop the floor.

她知道用Firsthand来拖地板是特别累人。

5·He knew firsthand the number was not more than eight.

因为他完全知道这一数字不超过8个。

6·MORE: Firsthand Experience of Don't Ask, Don't Tell.

更多：亲身体验“不问，不答”。

7·Do you have firsthand knowledge that the Earth is round (a sphere)?

你真的有第一手信息来说明地球是圆的(或一个球体)吗？

8·LICHTMAN: and I think most of us have had firsthand experience.

利希曼：我想，我们许多人都有亲身体会。

9·Thankfully, most Americans do not know, at least not firsthand.

谢天谢地，大多数美国人并不知道答案，至少他们并没有亲身体验过。

10·You may be testing this code to see the results of this effort firsthand.

您可以测试这段代码以直接查看这次尝试的结果。

(1)firsthand information第一手资料