1. We continually wage war on them, for they contaminate our food, carry diseases, or devour our crops.
    人类不断同昆虫斗争，因为昆虫弄脏我们的食物，传播疾病，吞噬庄稼。

2. The heavy storms destroyed a good part of our crops.
    几场暴雨把大部分庄稼都毁坏了。

3. The crops had been harvested with the reapers.
    庄稼是用收割机收割的。

4. The land has been regenerated by rotation of crops.
    这块土地已通过轮作法恢复了地力。

5. The land has been regenerated by rotation of crops.
    这块土地已通过轮作法恢复了地力。

6. The heavy frost in late spring was ruinous to the crops.
    暮春的严霜对庄稼危害极大。

7. Those traditions teach that African women cook, clean, take care of children, sow and harvest crops and support their husbands.
    这些传统要非洲妇女做饭、搞清洁、照管孩子、种庄稼、收庄稼以及支持丈夫。

8. No one can plant crops on it. No one can build a house on it.
    没有人能在它上面种庄稼, 也没有人能在它上面造房子。

9. Natural disasters like storms and floods have washed away many crops.
    暴风雨和洪水这类自然灾害毁掉了许多庄稼。

10. Ample sunshine and rainfall are bringing the crops on nicely.
    充足的阳光和雨水正使庄稼茁壮地生长。