The farmers plant crops in the spring.

农民在春季种庄稼。

He learned how to help farmers plant crops.

他学会了如何帮助农民种地。

They announced when it was time to plant crops.

他们宣布的时候，是时候种庄稼。

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。

The seasons used to be certain and we would know when to plant crops.

以往的季节很确定，我们知道什么时候该种庄稼。