be at someone’s beck and call (随时为某人效劳)

Idiom Help

含义

to always be ready to help or obey someone

随时准备帮助或服从某人 (suíshí zhǔnbèi bāngzhù huò fúcóng mǒurén)

例句

"The assistant is at his boss’s beck and call."

"助理始终在老板的召唤下。" (Zhùlǐ shízhōng zài lǎobǎn de zhàohuàn xià.)