Keto-
pref. 酮\\n[醫] 酮[基]
?? 詞語組成解析
a. [化] 酮類的
??? 情景例句
He gave them to me to hold on to them
他給我戒指， 要我自己保管，
Speak less and listen more.
要少說多聽。
What are you doing?
你在干什么？