Penicillanic acid
[化] 青霉烷酸
🧩 词语组成解析
🗣️ 情景例句
She's hard to resist.
真是人见人爱。
Heaven helps those who help themselves.
天助自助者。
Ken gave up smoking two years ago. He'd been smoking for thirty years.
两年前肯戒了烟，之前他抽了三十年烟。