日出之前我就开始工作了。
你看起来非常乐于工作。
But a more subtle effect may also be at work.
但还有一个更微妙的影响也可能在起作用。
Affirmative, sir, I will be at work on time.
当然，先生，我会准时来上班的。
玛莉不可能正在工作。
In another three hours, I have to be at work.
三小时后，我得上班了。
He said that she might not be at work today.
他说她今天可能不上班。
Enzo did not have to be at work for two hours.
恩佐还有两个小时不必上班。
I should be at work, but my train's running late.
我要赶着去上班，可火车又晚点了。
No, that's too early. I'll still be at work then.
不行，太早啦，那时候我还在上班呢。
Be sure to be at work on time tomorrow, everybody.
大家明天一定要按时上班。
If you're supposed to be at work by 8:30, be there.
如果你得8点30分到公司工作，那就要做到。
Other variables, such as good management, may be at work.
其他一些因素，比如优良的管理，可能是高回报的原因。
But that still doesn't answer the question of what mechanism might be at work.
不过，这仍然没有说明是什么原理在起作用。
Why can't you be at work earlier? Everyone was expecting you this morning.
你不能早点上班吗？今早每个人都在等你。
But it's quite another story for those of us who have to be at work by 8 a.m.
但那对我们这些得在八点前上班的人来说就完全是另外一回事了。
The researchers did not say which environmental influences might be at work.
研究者并未说明究竟什么样的外部环境能确实产生影响。
The researchers did not say which environmental influences might be at work.
研究者并未说明究竟什么样的外部环境能确实产生影响。
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