虽然他们还不是很熟，校方档案显示，杨欣把朱海洋列为紧急情况联络人之一。
Though they apparently didn't know each other well, school records listed Zhu as one of her emergency contacts.
调查人员还在杨欣屋内发现了一张写给朱海洋的40美元支票，这一线索进一步表明了两人很熟。
Investigators also found a $40 check made out to Zhu in Yang's room, a further clue the two were well acquainted with each other.
朱海洋只在朋友面前提到过一次杨欣。
This was the only time the friend had heard Zhu talk about Yang.
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