英语问题

Question

Great Britain had large amounts of coal; however, there were not yet efficient means by which to produce mechanical energy or to power machinery. 句中 为什么用 by which to ？

Answer 1

means在这句话中的意思是“方式、方法”，用什么什么方法的介词是by。这句话的后半句是一句定语从句，所以用by which，which就是前面的means。

希望对你有帮助~望采纳~

Answer 2

by应该是跟在means后面的，表示用什么方式，表被动，which指代的是coal，to应该和前面的had一起连用，have sth to do sth，表示有些事情要做，还未做。

这是我自己的见解，望采纳！

Answer 3

which在这里是代指coal