adj.松(弛)的;清淡的;不活跃的;懈怠的;
v.懈怠;偷懒;减速;放松;
n.宽松裤;(绳索等)松弛部分;煤屑;(人员、资金或地方的)富余的部份;
例句:
It's natural to slack off towards the end of a hard day's work.
辛苦工作了一天,快结束时有所松懈是很自然的.
She was staring into space, her mouth slack.
她双唇微张,失神地望着前方。
Ask them to be more careful. Don't let them get slack.
你要他们仔细点, 不要马马虎虎.