They can never be relied upon to do well anything they undertake.

你永远不能指望他们做好任何工作。

Indeed, she could clearly run the kingdom, should she be called upon to do so.

她可以管理这个王国了，如果需要她这么做的话。

" They can be prevailed upon to do so, though, or else why and where were they escorting you this morning" ?

“不过，他们可以被说服这样做，否则他们今天早上为什么要护送你，去哪里”？

But do we, you and me, know what he is called upon to do, what path to take, what actions to perform, what pain to endure?

但是我们，你和我，知道他被要求做什么，要走什么路，要采取什么行动，要忍受什么痛苦吗？

Larry Tesler was one of the Xerox scientists called upon to do the briefings, and he was thrilled to show off the work that his bosses back east had never seemed to appreciate.

拉里·特斯勒是奉命进行展示的施乐科学家之一，他对有机会展示自己的工作成果非常兴奋，因为这些从来都得不到远在东部的老板们的赏识。

What made it more difficult still, was that his chief at St Luke's was away, and he was obliged to be in London in case he should be suddenly called upon to do some operation.

更困难的是， 他在圣卢克医院的主管不在， 他不得不在伦敦， 以防突然被叫去做手术。

When she was taking in the evening's milk for the cook (there was really no odd job she was not called upon to do), she saw something occur which made the situation more interesting than ever.

当她为厨师取晚上的牛奶时（真的没有什么零活不是她不被要求做的），她看到发生了一些事情，这让情况变得比以往任何时候都更有趣。