系好安全带可以减少一半以上的死亡或重伤的几率。
Wearing a seat belt can reduce your chance of death or serious injury by more than half.
科学家们发现，每天喝一到三杯酒的人患心脏病的几率是不饮酒者的一半。
The scientists found that people who sip one to three drinks a day are about half as likely to suffer heart attacks as nondrinkers are.
他们发现，与男性申请者相比，女性申请者获得出色的推荐信的几率只有男性申请者的一半。
They found that female applicants were only half as likely to get outstanding letters, compared with their male counterparts.
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