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
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