Docosahexenoic acid (dha)
[化] 二十二碳六烯酸
🧩 词语组成解析
🗣️ 情景例句
No, no.
不 不。
When an opportunity is neglected, it never comes back to you.
机不可失，时不再来。
A temporary rudder was made on board from spare planks and it was fitted with great difficulty.
船员用备用的木板在船上赶制了一只应急用的舵，并克服重重困难将舵安装就位，