核心问题
Rip is tall for his age.
如何解释句中介词 for 的含义?
词典解答
这里的介词 for 是表示比较的“标准”(standard)。Rip is tall for his age. 可以理解为 Rip is taller than normal. 请看下面的例句：
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That dog is long-legged for a terrier. (CGEL) 那条狗按 獏而论腿是很长的。( 獏是一种小狗)
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It is quite warm tonight for February. (Shaw) 就二月份来说,今天夜里的天气是够暖和的了。
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On educational matters his views were advanced for his day. (Mis) 他在教育问题上的观点, 就他那个时代而论, 是很先进的。