Macrocycle
(包含15个原子以上的)大环
🗣️ 情景例句
Easy does it, tom. don't get all worked up.
冷静点，汤姆，不要太激动。
It's a piece of cake.
这很容易。
All we have to do is sign the contract.
剩下的只要签订个契约就行了。