blind off的用法和樣例：
例句
- The drift to the mine was blocked off.
礦井的水平巷道被堵塞了。 - It is also clogged with sebum and sloughed off dead skin cells, but the lack of exposure to the air does not lead to the oxidation ofmelanin, so the clogged matter stays white.
也是被皮脂腺和脫落的皮膚死皮細胞堵塞，但是因為它不接觸空氣，黑色素并沒有被氧化，所以堵塞的那一頭始終是白色的。
