beck
/bek; bɛk/ n
(Brit dialect 方) mountain stream; brook. beck, / bek; bɛk/ n (idm 习语) at one's/sb's ,beck and `call always ready to obey one's/sb's orders immediately 听命於人; 唯某人之命是从
The king has always had servants at his beck and call. 国王有奴仆们随时听他使唤.
I'm not at your beck and call, you know. 你要知道, 我是不会听你指使的.