医生发现血栓阻塞了病人的静脉。

The doctor found that a blood clot was ___occluding the patient's vein.

山脉会阻挡气流，导致云层形成和降雨。

The mountain range will ___occlude the air flow, resulting in cloud formation and rain.

这种多孔材料能够有效地吸附并锁住空气中的有害气体。

This porous material can ___occlude toxic gases from the air effectively.