1、And I take my pocket knife and I put the knife, I jam my knife in here. So this is the knife.
我拿起小 * ，把它抵在這里，把刀抵在這里，這就是那刀。

2、He took out his pocket knife and cut the restraints that held each of them in place.
他拿出他的小刀割斷了綁著他們的繩子。

3、He took his pocket knife and in the big oak made a groove.
他拿出隨身攜帶的小 * ，在大橡樹(shù)上劃了一道溝槽。

4、My brother bought me a pocket knife yesterday.
我的弟弟昨天給了我一把小刀。