关于in which用法,
例：Paris is the second oldest,in which it was opened in the year 1900.
这句话之前再说各国开通地铁的时间.
in which 中的 in 不应该是后面句子中提到前面的吗?
还是说in which 就是当where来理解就行了?
按非限定定于从句来理解,which指的不是前面一句话吗?那现在in which 只是指的 paris吗?