But one can often be in doubt about the effect of a word or a phrase, and one needs rules that one can rely on when instinct fails. I think the following rules will cover most cases.
但是人会经常怀疑一个词或短语的效果，如果直觉靠不住的时候就需要规则。
I doubt the photographer just happened to be standing in the desert when these five women walked by.
我吃不准在这五名妇女走过时，摄影师是否正好站在沙漠里。
Later, when I wrote about soccer in Italy and spent time with the players, they not only confirmed my impressions but expressed doubt that things could ever be otherwise.
后来当我在意大利撰写足球专栏并和球员们接触之后，他们不光证实了我先前对比赛的印象，同时对这一局面心安理得。
However, do not assume someone is going to be your best friend just because you work in the same office eight hours a day; and when in doubt, you should err on the side of caution.
然而，不要以为每天在同一个办公室工作8个小时的人就会成为你的好朋友。当你有疑问的时候，应该选择谨慎而行。
Be aware of encoding issues and when in doubt, follow the detailed guidelines in the DB2 9 documentation.
要了解编码问题，如果有疑问，可以参考db 29文档中的详细指南。
Expressions like the one above must be avoided. When in doubt, break a large expression into multiple statements to ensure that the order of evaluation is correct.
像上面一样的表达式应该避免。当有歧义时，将一个复杂的表达式分解成多个陈述以保证赋值的顺序是正确的。
Just be honest with yourself. When in doubt, stop and think. When too tired, go watch television.
诚实的面对自己就好了。因惑的时候就停下来想一想。太累了就去看看电视。
Rudyard Kipling once wrote in his poem "if," that you will be a man if you can stand up and say what you believe in when all men around you doubt you.
鲁德亚德·吉卜林曾在诗作《如果》中写道，如果你能在旁人都怀疑你的时候站起来宣布你的信念，你就是一个真男人。
Sure, there will be a moment of doubt when you stand alone, on an empty road, in an icy rain or when you are ill in a rented bed.
当然，当你孤独一人，在空旷的路上，在冰冷的雨中，或是在陌生的床上生着病的时候，你或许会有些怀疑。
The coach must be in charge. When the rider says, "Do More, " the coach should question whether that's wise. Doubt is a good enough reason to discontinue the session.
教练必须负责在骑手说“我可以再多骑一些”时，提出质疑，不管这个质疑聪明与否，怀疑是中断训练周期的足够理由。
No doubt Manchester United are in fine form. But there would be a day when their bubble will burst.
但无疑曼联现在状态不错，但可能在将来的某一天，他们的输球风暴将到来。
No doubt when nuclear power's collapse in the global marketplace, already years old, is finally acknowledged, it will be blamed on Fukushima.
毫无疑问，当世界终于知道早已年迈的核能在世界市场中已经崩溃，他们会归咎于福岛事故。
No doubt when nuclear power's collapse in the global marketplace, already years old, is finally acknowledged, it will be blamed on Fukushima.
毫无疑问，当世界终于知道早已年迈的核能在世界市场中已经崩溃，他们会归咎于福岛事故。
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