being的用法，哪位大牛讲下也

mudiduange · 发表于 2010-9-16 17:41:06

我先贴个句子，这个是正确的：
According to one expert, the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria as that the breeds have relatively few founding members.

mudiduange · 发表于 2010-9-17 00:26:56

ding

being的用法，哪位大牛讲下也

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