1.employ v.雇佣；使用

They employ casual labor to pick the fruit
他们雇佣临时工摘水果。

2.sponge n.海绵

The sponge soaked in the water on the desk.
海绵将书桌上的水吸了进去。

3.mammalian n.哺乳动物

The report is on mammalian thermoregulation.
那份报告是有关哺乳动物的体温调节。

4.glacier n.冰河；冰川

The glacier dislocated the great stones.
冰河搬动了巨石。

5.rotate v.轮流；旋转

Interns have to rotate for a few months.
实习医生轮流工作了几个月。