Make a slit in the stem about half an inch long.

在树干上割一个约半英寸长的口儿。

She watched them through a slit in the curtains.

她透过窗帘的缝隙注视着他们。

They say somebody slit her throat.

他们说有人割断了她的喉咙。

He began to slit open each envelope.

他开始撕开每个信封。