🧩 词语组成解析
membrane
['membrein]
n. （动物或植物体内的）薄膜;隔膜;（可起防水、防风等作用的）膜状物;
[电] 形成
🗣️ 情景例句
What classes are mandatory for your major?
你的专业什么课是必修的？
Politeness costs nothing and gains everything.
礼貌不费分文而可赢得一切。
Please come in and sit down. But come to school earlier next time.
但下次要早点到校。