cut someone some slack

(N. Amer. informal)allow someone some leeway in their conduct

(北美，非正式)允許某人行為有些余地

take (或 pick up) the slack

use up a surplus or improve the use of resources to avoid an undesirable lull in business

抓緊松弛環(huán)節(jié)，治理整頓（指利用盈余或提高資源使用率以避免不良的生意停滯）

as domestic demand starts to flag, foreign demand will help pick up the slack.

由于國內(nèi)需求開始萎縮，外貿(mào)需求將有助彌補損失。

pull on the loose end or part of a rope in order to make it taut

拉緊松弛的繩索

slack off

To decrease in activity or intensity.

放松，緩和：在活動或緊張方面下降