Under their tractors and combine harvesters, vast tracts of grasslands became grain fields, then deserts.

在他们的拖拉机和联合收割机的作用下，大片草原变成了粮田， 然后变成了沙漠。

He looked out into the grain field trying to recover his hard brassy attitude.

他望着麦田， 试图恢复他强硬的黄铜态度。