on call

基本解釋

Her team has been on call since 9/11; the hero bots' first mission was to comb through the rubble at the World Trade Center.
他的團隊從9·11時間之后一直待命；主角機器人的第一次任務是在世貿(mào)中心徹底對瓦礫進行徹底搜索。
Seeing as paramedics have high stress jobs that require them to be on call and ready to save lives at a moment's notice, you might expect their mean annual salary to be higher.
可以看見的是，護理人員有如此高壓力的工作，要求他們隨叫隨到，并時刻準備好立即搶救生命，你可能想象他們的工資應該會更高些。
By the time I got my morning briefing from Carville, Stephanopoulos, and whoever else needed to be on call that day, they could lay out exactly where we were and what we needed to do.
某天早晨，卡維爾、斯迪法諾普洛斯和那天所有必須隨叫隨到的人向我匯報了工作，他們可以精確地分析出我們處于的形勢和必須采取的措施。

For the next 12 hours, the medevac teams and machines will be on call to evacuate wounded troops from anywhere in eastern Afghanistan to Bagram's military-run trauma hospital.
I wonder have any of you reflected on, I don't want to call it shadow side, is not domesticated.
不知道你們有沒有人想過這個問題，我不想說這是自然的陰暗面，無法馴化的一面。
普林斯頓公開課 - 人性課程節(jié)選
Do you have available to you what we call the hacker editions in more details on those in the courses syllabus?
你是否有黑客版套題,比教學大綱上的版本更詳細？
哈佛公開課 - 計算機科學課程節(jié)選

There are no limits on call times, and the resulting sessions occasionally resemble protracted talk therapy.
NEWYORKER: Happy Feet

used to describe workers who are available to make official visits at any time when they are needed
If a worker such as a doctor is on call, he or she is available to work or make official visits at any time when needed.