并没有规则要求使用哪种标记，除了用你个人的判断：哪种更便于阅读你画的类图。
There is no rule for determining which notation to use, except to use your personal judgement regarding which is easiest to read for the class diagram you are drawing.
它当然是一件赝品，这所房子以前的房客只会选那一类的画——老房子得有老式画像来配它。
A fraud of course, for the people who had this house before us would have chosen pictures in that way — an old picture for an old room.
他的画哪一类也算不上。
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