Ratching
作棘齒, 刻鋸齒
??? 情景例句
I need multimedia capability for my system.
我的計(jì)算機(jī)系統(tǒng)需要多媒體功能。
I invited him ti come down, but he wouldn't.
我請他下來，但是他不肯。
Supper is ready at six.
晚餐六點(diǎn)鐘就好了。