Chromoisomerism
[機] 異色異構
??? 情景例句
He's the Dean of Admissions for the University of Michigan.
他是Michigan大學的新生注冊主任。
Let me tell you the details.
讓我告訴你細節。
Summer is from December to February, and winter is in June, July and August.
夏天從12月到2月，冬天是在6月、7月和8月。