Ketine
[化] 2,5-二甲基吡嗪
??? 情景例句
As Ms. Smith has indicated on several previous occasions.
史密斯夫人在先前的幾個場合已表示過我們對目前的印刷的安排很滿意。
You've come up with a good idea.
你想出來的主意好極了。
Here's your umbrella and your coat.
這是您的傘和大衣