The Onions too, once sprouted have ground to a halt, encrusted in frost, perched on the frozen soil.
洋葱也是，一旦发芽就停下来，在霜中长壳，栖息在霜冻的土中。
3
The driving force of moisture migration in soil is the key of discussing the mechanism of freezing ice and frost heave and the stress of freezing soil.