Suddenly,he put his hand into the water and rubbed two of his fingers together, making a strange sound, exactly like the sound of a croaking frog.

VOA: special.2011.02.19

If you put your fingers between the plastic opening at the bottom, and here's where you gotta watch out for the spring, pull the thing apart and that's it.

如果你把手指放到,底部的缝隙中间，这里你需要小心，你剥开就会发现这个了。

哈佛公开课 - 计算机科学课程节选

FDR actually put its fingers on something other people overlooked.

罗斯福政府事实上把精力花在了,别人忽视的地方。

斯坦福公开课 - 经济学课程节选