not let the grass grow under your feet
US /nɑt lɛt ðə ɡræs ɡroʊ ˈʌndər jʊər fiːt/
UK /nɑt lɛt ðə ɡræs ɡroʊ ˈʌndər jʊər fiːt/

1.
不让草长在脚下, 迅速行动
to not delay in taking action; to act quickly and without hesitation
:
•
When the opportunity arose, she didn't let the grass grow under her feet and applied for the job immediately.
机会出现时,她没有让草长在脚下,立即申请了这份工作。
•
If you want to succeed, you must not let the grass grow under your feet; always be proactive.
如果你想成功,就必须不让草长在脚下;永远要积极主动。