The impenetrable fog over the harbor delayed all outgoing cargo shipments until noon.

港口上空濃得化不開的霧，使所有出港貨運延誤到中午。

Our flight was diverted because an impenetrable layer of cloud covered the airport.

由於一層厚重不透光的雲覆蓋機場，我們的班機改降他處。

The conference room's impenetrable blackout curtains made the projector slides perfectly clear.

會議室完全不透光的遮光窗簾讓投影片顯示得非常清楚。