Quatenary carbon atom
[医] 第四碳原子, 季碳原子
🧩 词语组成解析
🗣️ 情景例句
but this is too much!
但是这太令人难以置信了！
We think $ 87,000 per unit with a five percent discount for orders over 100.
我们减少到每台8。7万美元，订购超过100台给予5%的折扣。
I like reading English books, but they're sometimes rather hard.
我喜欢看英语书，但有时候英语书相当难读。