大约三星期之前突然出现了反常的低气压，当我们遭遇它的影响后，又产生了一个低气压，让我们更加偏离了航向。
Some three weeks ago it suddenly produced an atypical depression. Then, after we had surfaced from its effects, it produced another and sent us even farther off course.
大约要一个星期后归还。
他着手进行了一项实验，要求志愿者们每晚睡大约七个半到八个小时，一个星期后再将睡眠时间调整为六个半到七个小时。
He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.
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