A second study on the same product sponsored by Family Health International conducted in Nigeria has also been stopped because of the safety concerns in the first trial.
由于担忧这次试验的安全问题,家庭健康国际在尼日利亚发起的关于同一制品的另一次研究也已停止。
Concerns about aircraft safety during the eruption of an Icelandic volcano in 2010 were well founded, according to a new scientific study.
通过一项新的的科学研究成果,在2010年冰岛的一座火山喷发期间的飞行器安全问题已经得到关注。
However, the volunteers were followed for only a couple of years, on average, and the study can't guarantee the long-term safety of the approach.
不过,研究平均只跟踪志愿者几年的时间,不能担保这种方法的长期效果。
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