•a positive attitude乐观的态度

•On a more positive note, we're seeing signs that the housing market is picking up.更乐观地说，我们看到了房地产市场正在好转的迹象。

•The past ten years have seen some very positive developments in East-West relations.在过去的十年里，东西方关系有了一些非常积极的发展。

•There was a very positive response to our new design - people seemed very pleased with it.我们的新设计获得非常积极的回应——看来人们对该产品非常满意。

•[+ (that)] Are you positive (that) you saw me switch the iron off?你肯定你看到我关掉了熨斗的开关吗？

•"Are you sure it's okay for me to use your mother's car?" "Positive."“你确定我可以开你母亲的车？”“完全确定。”

•"It was him - I saw him take it." "Are you positive about that?"“是他——我看到他拿的。”“你对此肯定吗？”

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•a positive pregnancy test呈阳性的怀孕检验

•He's HIV positive.他爱滋病检验呈阳性。

•She tested positive for hepatitis.她肝炎检验呈阳性。

•Far from being a nuisance, she was a positive joy to have around.有她在身边完全是个乐趣，一点都不令人讨厌。

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•Two is a positive number.2是正数。

•My blood type is O positive.我的血型是 O 型 Rh 因数呈阳性。