Question

求助英语大神

Sir Edmund Halley (1656-1742), an astronomerand the first real proponent of using the salt clock to calculate the age of the Earth, surmised that the original ocean was not salty and that subsequently salt must have derived from the weathering of rocks was brought to the sea by streams.
后半句“and that subsequently salt must have derived from the weathering of rocks was brought to the sea by streams. ”有两个谓语must have derived和was brought啊？怎么理解

Answer 1

你的怀疑是对的。
你查看一下原文，感觉was brought是打印错了，was必须去掉，否则语法讲不通。

Answer 2

应该是漏了and.

that subsequently salt must have derived from the weathering of rocks and was brought to the sea by streams.

Answer 3

个人觉得这句话应该是讲述盐分怎么形成和汇集到海洋里的，这里面的两个动词应该是并列的成分，所以应该是少了一个连词and，在rocks和was之间。我也有在想后面这个句子会不会是rocks的定语从句，但是谓语动词还是单数，应该还是指salt。
个人见解，欢迎探讨，采纳~