浓密的雾气完全遮蔽了前方的道路。

The thick fog completely ___occludes the road ahead.

气象图显示冷暖气团正在交汇，即将形成锢囚锋。

The weather map shows cold and warm air masses are about to ___occlude, forming an occluded front.

这种特殊材料能有效阻隔空气中的有害气体。

This special material effectively ___occludes harmful gases from the air.