COLOLIN802: para12 英文版第二句开始错了，这段应该是 ⑫　The students and the professors have made a deal: neither of them has to throw himself heart and soul into what happens in the classroom. The students write their abstract, over-intellectualized essays; the professors grade the students for their capacity to be abstract and over-intellectual, and often genuinely smart. For their essays can be brilliant, in a chilly way; they can also be clipped off the Internet, and often are. Whatever the case, no one wants to invest too much in them—for life is elsewhere. The professor saves his energies for the profession, while the student saves his for friends, social life, volunteer work, making connections, and getting in position to clasp hands on the true grail, the first job.

2301_81056640: 太拗口了这篇文章

2301_79829641: 正交向量组可以有零向量

Reide: 在三维空间，三向量就等价三向量共面了，如果有两个共面，那么第三个可以线性表示，一定和那两个共面，所以三向量等价共面，没有你说的这个条件

ᑋᵉᑊᑊᵒ796: 后面翻译不完整😭