I believe that is a proper standard by which to judge people为什么不这么说:I believe that is a proper standard to judge people by.

问题描述:

I believe that is a proper standard by which to judge people
为什么不这么说:I believe that is a proper standard to judge people by.

因为听起来别扭~

我觉得这就是看人的标准

by which这是一个定语从句,是指前面提到的standard.
你的那句是错误的,你可以把by去掉,如果再后面用by,整个句子成分不全,少了主语.