OG138:The direction in which
The direction in which the Earth and the other solid planets-Mercury,Venus,and Mars-(spins were determined from) collisions with giant celestia bodies in the early histroy of the solar system. 划线部分是括号中的内容 我的疑问是这里were已经作为verb出现了,spin作为什么结构出现呢?如果是spin做名词,那么为什么spins不就应该是复数形式了么? |