Flap valve
[化] 片狀閥; 瓣閥
?? 詞語組成解析
flap
[fl?p]
n. 扁平物;[航] 襟翼;拍打，拍打聲;〈口〉不安，恐慌;
v. 上下或左右移動、擺動;輕拍;振翅而飛;
valve
[v?lv]
n. 閥;真空管;（管樂器的）活栓;（心臟的）瓣膜;
vt. 裝閥于;以活門調節;
??? 情景例句
You're right. We've earned it.
你說得對，我們有這樣做的權利。
He's been behind bars for almost 30 years.
他坐了將近30年牢。
But wouldn't you like to spend an extra day or two here?
你們不愿意在北京多待一天嗎？