He practiced crop rotation and soil conservation a century before these became standard practice, and he invented a plow superior to any other in existence.
他练习作物轮作、水土保持一个世纪之前，这些被成为标准的做法，他发明了一种犁优于其他任何存在。
2
He practiced crop rotation and soil conservation a century before these became standard practice and he invented a plow superior to any other in existence.
在人们普遍利用农作物轮作和土壤保持的作法前一个世纪，他就这样做了。
3
He practiced crop rotation and soil conservation a century before these became standard practice, and he invented a plow superior to any other in existence.