unblock

1.unblock a road; unblock a coronary artery.

清除路；冠状动脉

2.the firm unblocks your drain with high-pressure jets.

公用高压喷射您的排道。

3.When the pipe was unblocked, the water drained out.

一打开管, 就了出来。

4.Father told me to unblock the pipe to let the water run through.

父亲叫我把管子打, 让过去。