Never block up ventilators.千万不要堵住通风设备。

Any holes in the kitchen where the mice are getting through?—I've blocked them up.厨房里还有老鼠洞吗？——我全都堵上了。

There's something blocking up the sink.什么东西把水槽堵了。

The sink keeps blocking up.水槽总堵。

With this disease the veins in the liver can block up, and all sorts of damage follows.患这种疾病后, 肝脏的血管就会堵塞, 各种损伤就会随之而来。