Lesson
Barn door (is open): someone's pants zipper is unzipped.
E.g., Alex's barn door is always open. Whey does he always forget to zip up?
(艾力克斯的褲子拉鍊總是開開的, 他怎麼總是忘記拉上拉鍊呢?)
Barn door就是我們說的「石門水庫」。就是褲子的拉鍊處，就像「穀倉的門」一樣。所以要提醒別人說前面褲檔拉鍊沒拉的時候，就用barn door來形容。
"Dude, your barn door is open and I can see your pink underwear!"
(大哥~你的褲襠是開的, 我都看到你粉色內褲了!)
