女孩没有病史，大夫看得十分清楚，她已经死了。
Although the girl was not accompanied by a medical history, the doctor could see perfectly well that she was dead.
倾向于作这种选择的人们或许在他们一生中经历过好几次意外事故，也或许是来自于有病史的家庭。
People who exhibit adverse selection may have had several accidents in their lifetime or may o come from families with a history of health problems.
倾向于作这种选择的人们或许在他们一生中经历过好几次意外事故，也或许是来自于有病史的家庭。
People who exhibit adverse selection may have had several accidents in their lifetime or may o come from families with a history of health problems.
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