people are trying hard to protect and record what is left.为什么不是what has been left?
问题描述：
people are trying hard to protect and record what is left.为什么不是what has been left?
答
因为前边的people are trying hard to protect and record,这个表示现在人们还在做这件事,并没有停止,将来也不会停,换句话说,100年后人们还在保护和记录的事物,有可能是今天发生的,或者是明天发生的,所以这个事并不...