Back-pressure valve
[化] 止回閥
?? 詞語組成解析
back
[b?k]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背書于;下賭注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
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
When you're ready to get off, remember to press the button near your seat.
當你要下車時，記得按你座位旁的按鈕。
Los Angeles. I stayed with my brother.
落杉磯。上我兄弟家去了。
At night, the children always do their homework.Then they go to bed.
晚上，孩子們總是做作業，然后去睡覺。