Lactonic
a. [化]內酯酸的, 無水氫氧酸類的
??? 情景例句
A good marriage takes work and shouldn't be based on feelings alone.
一段好的婚姻要用心去經營，而不是僅僅建立在感情的基礎上。
A leader should not dictate to his followers.
領導者并不是向部下下達命令便了事的。
You don't need anything special.
你不需要什么特別的東西。