always having to be ready to obey someone's orders immediately唯某人之命是从,随时听候某人的差遣
at (one's) beck and call
Ready to comply with any wish or command.唯命是从:愿意依从任何愿望或命令
柯林斯高阶英汉双解学习词典释义
PHRASE
听凭…调遣;听命于…
If one person is at another's beck and call, they have to be constantly available and ready to do whatever is asked, and this often seems unfair or undesirable.