这非常有用，因为它允许特征在不了解实现特征的实际基类将是什么的情况下调用super 。
This is useful because it allows a trait to call super without having to know what the actual base class of the class implementing the trait will be.
没有人比俱乐部里的成员更了解迈克尔的情况，如果我们一定要做些什么的话，那么我的工作就是让他尽快康复，让他适合为纽卡比赛。
There's no one more qualified than the staff at Newcastle to know what Michael's condition is and if and when we ought to be doing anything about it. My job is to get him fit to play for Newcastle.
没有人比俱乐部里的成员更了解迈克尔的情况，如果我们一定要做些什么的话，那么我的工作就是让他尽快康复，让他适合为纽卡比赛。
There's no one more qualified than the staff at Newcastle to know what Michael's condition is and if and when we ought to be doing anything about it. My job is to get him fit to play for Newcastle.
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