事实上，最好在会议开始前至少十分钟到达。
In fact, it is better to arrive at least ten minutes before the meeting starts.
快点！我们必须在会议开始前把椅子上的尘土擦掉。
Hurry up! We must wipe off the dust on the chairs before the meeting.
我们今天下午应该在会议开始前和哈利先生先谈一下。
We should have a talk with Mr. Hary this afternoon before the meting begins.
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