自此以后,他努力研发高产水稻,这帮助农民比以前收获两倍用英语怎么说？

Question

如题所述

Answer 1

自此以后,他努力研发高产水稻,这帮助农民比以前收获两倍。
英语：
Since then, he has made great efforts in developing high-yield rice, and has helped farmers’ harvest in amount twice more than before.

Answer 2

自此以后，他努力研发高产水稻，这帮助农民比以前收获两倍。
用英语表达：
Since then, he has worked hard to develop high-yielding rice, which helped farmers to harvest twice as much as before.

Answer 3

Since then, he has worked hard to develop high-yielding rice, which has helped farmers harvest twice as much as before.

Answer 4

自此以后,他努力研发高产水稻,这帮助农民比以前收获两倍
Since then, he has worked hard to develop high-yielding rice, which helped farmers to harvest twice as much as before

Answer 5

Since then, he has worked hard to develop high-yield rice, which has helped farmers to harvest twice as much as before