to do something while waiting
在等待时做某事 (zai dengdai shi zuo mǒu shì)
"We played cards to kill time before the show started."
"我们玩牌来打发时间，直到节目开始。" (wǒmen wán pái lái dǎfā shíjiān, zhídào jiémù kāishǐ)
To focus closely on something
to support or to make a copy of important data
to develop or become successful over time
to watch someone carefully because you don’t trust them comp...
to contact a potential customer without prior introduction
not very intelligent; not a genius
