The direction a hurricane's spiral moves is counterclockwise.
陈老师:
没错,句中的 a hurricane’s spiral moves 确实是定语从句,它前面没有关系代词是因为被省略了,若不省略应该是:
The direction in which ahurricane’s spiral moves is counterclockwise. 飓风螺旋式运动的方向是逆时针的。
我觉得这里的 the direction (in which) 的用法及省略方式多少有些类似于 the way (in which) 以及 the reason (for which) 的用法及省略方式。
波老师:
完全同意陈老师的分析。请比较以下各组句子:
▲比较(第一组):
This is the reason for which she did so. 这就是她这样做的理由。
This is the reason why she did so. 这就是她这样做的理由。
This is the reason that she did so. 这就是她这样做的理由。
This is the reason she did so. 这就是她这样做的理由。
▲比较(第二组):
Pleas show me the way in which you did it. 你怎样做的,请示范给我看看。
Pleas show me the way that you did it. 你怎样做的,请示范给我看看。
Pleas show me the way you did it. 你怎样做的,请示范给我看看。
▲比较(第三组):
The direction in which a hurricane’s spiral moves iscounterclockwise.
The direction that a hurricane’s spiral moves iscounterclockwise.
The direction a hurricane’s spiral moves is counterclockwise.