gravity vent的用法和樣例：
例句
- Lincoln and Michael climb from the vent and cut the sheet rock in the wall leading to Oren's office.
林肯和邁可從通風(fēng)孔爬入，鑿穿了與歐倫辦公室的保險箱相連的薄薄的一層墻。 - It's because of this, that makes them better than a conventional plastic vent or louver.
這是這個(gè)原因，這使得它比傳統塑料通風(fēng)孔或百葉窗更好。
