Doctors can collect it with a needle. But people who donate marrow must first have tests to make sure they are a good match for the patient.

VOA: special.2009.12.16

It's like telling your horoscope; if you're general enough, you're going to make a match.

这就像识别你的星座，如果你的特点足够宽泛，一定能够找到和星座的一个匹配点。

耶鲁公开课 - 1945年后的美国小说课程节选