引言:
一些发布会错觉~~

alumnus /əˈlʌmnəs/
1
N-COUNT 校友;毕业生
The alumni of a school, college, or university are the people who used to be students there.
alumni /əˈlʌmnaɪ/ (alumnus的复数)
Harvard Alumni Association
哈佛大学校友会

美 aluminum /əˈlumənəm/ 英 aluminium
noun
[U] (symb Al) 铝
a chemical element. Aluminum is a light, silver-grey metal used for making pans, etc.
aluminum saucepans/window frames
铝锅 / 窗框
aluminum foil (= for example, for wrapping food in )
铝箔(如用于包裹食物)

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