to prepare to work hard or take on a challenge
准备努力工作或接受挑战 (zhǔnbèi nǔlì gōngzuò huò jiēshòu tiǎozhàn)
"We need to roll up our sleeves if we want to finish this task on time."
"如果我们想按时完成这个任务，我们需要卷起袖子。" (Rúguǒ wǒmen xiǎng ànshí wánchéng zhège rènwù, wǒmen xūyào **juǎn qǐ xiùzi**.)
to make unrealistic plans or dreams
to make something level or balanced
a state of complete freedom or lack of pressure
to submit something to someone in authority
permission to start or go ahead with something
a sudden and unexpected event
