参考例句

1. The identity of each sex is not so easy to pin down .

   确定男女各自的特征并不那么容易。

2. To pin down the size of an orbital, we take a contour surface.

   为束缚住轨道的大小，我们取一等值面。

3. It was difficult for me to pin down the subject.

   对我来说，要弄清楚这个问题很困难。

4. It is never possible nowadays to pin down any date within a year or two.

   要把任何日期确定下来，误差不出一两年，在当今的时世里，是永远办不到的。

5. They plan further work in the area to try to pin down the factors responsible.

   他们打算在这一地区做些工作以期确证这些因素。

6. Within the smaller area more intensive observations are made to pin down prequake signals.

   在较小的区域内，还要进行更慎密的观察以便记录临震信息。

7. She' s a difficult person to pin down .

   她这人行事、 说话没个准儿.

8. The task of their regiment was to pin down one of the flanks of the invading army.

   他们团的任务是牵制侵略军的侧翼。

9. You must pin down every quotation to its author.

   你一定要确定每一条引文的作者是谁。

10. He's a difficult man to pin down .

    他是个不易就范的人。

同义词

• nail down
• narrow
• narrow down
• peg down
• pin up
• specify