slack
adjective uk/slæk/ us/slæk/
(NOT TIGHT)
不紧的，松的
not tight; loose
These tent ropes are too slack - they need tightening. 这些帐篷绳太松了——需要把它们紧一紧。
(NOT ACTIVE)
萧条的，不景气的;冷清的;懈怠的
showing little activity; not busy or happening in a positive way
Business is always slack at this time of year. 每年的这个时候生意都很清淡。
UK disapproving Discipline in Mr Brown's class has become very slack recently. 布朗先生班里的纪律最近变得十分松懈。
UK disapproving The job is taking a long time because the workmen are so slack. 这项工作花费了很长时间，因为工人很懒散。
slack
noun uk/slæk/ us/slæk/
(NOT TIGHT)
[ U ]松弛，不紧
the fact that something is too loose
There's too much slack in these ropes. 这些绳子有太多的地方很松弛。
The men pulled on the ropes to take up the slack (= to tighten them). 男人们拉绳子将其收紧。
(TROUSERS)
slacks[ plural ] US or UK old-fashioned （不属于套装一部分的）长裤
a pair of trousers, that are not part of a suit
wool slacks 羊毛长裤
(COAL)
[ U ]煤屑
very small pieces and dust from coal
Idiom
pick up/take up the slackidiom 接替中断的工作
to do the work that someone else has stopped doing but still needs to be done
If Sue gets a job, Mike will have to take up the slack at home. 如果苏找到了工作，迈克将不得不接替她做家务。
slack
verb [ I ] informal uk/slæk/ us/slæk/
松懈，懈怠
to work more slowly and with less effort than usual, or to go more slowly
Everyone slacks off/up at the end of the week. 每个人到了周末都有些懈怠。
disapproving You'll be in trouble if you're caught slacking on the job. 如果你被抓到工作时偷懒，那你就麻烦了。
Slack off your speed as you approach the corner. 接近拐角时，你要放慢速度。