be on call

be on call 基本解释

可随时支付的随叫随到

be on call 用法和例句

1、Robots that some expected to be on call were conspicuously absent.

本以为能随时待命的机器人明显缺席了。

重点词汇

call v. 呼唤，喊叫；召唤，叫来，召集；下令，命令；打电话给 n. 喊叫，大声喊；电话联络；必要，理由；要求