One study showed that even as few as ten cigarettes a day can damage fertility.
一项研究表明，每天哪怕只抽10支烟也会损害生育能力。
One study showed that friendships among ninth graders were far from stable.
一项研究表明，九年级学生之间的友谊并不稳定。
One study showed that reflexology on the feet had no effect on pain and functioning.
一项研究表明站立的反射理论对疼痛和功能没有影响。
One study showed that such systems increase the number of people dying in their homes.
一调查显示，这个系统增加了在家死亡的人数。
The study showed that one in twelve women is likely to develop breast cancer.
研究表明，十二分之一的女性易患乳腺癌。
The study showed that there is one peak period of meat condition every year.
研究结果表明：长竹蛏一年有一个肥满期，一个消瘦期。
The study showed that there is one peak period of meat condition every year.
研究结果表明：长竹蛏一年有一个肥满期，一个消瘦期。
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