Chitin
n. 几丁质, 壳多糖\\n[化] 壳多糖; 几丁质; 甲壳质
🗣️ 情景例句
It's six o'clock.
已经六点了。
Civility costs nothing.
礼貌不须什么代价。
I have often tried to conceive of what those pages might contain,
我常常试图想像这些纸上所写的东西，