Robert Accetta, lead investigator for the NTSB, said crews were applying post-tensioning force,but investigators aren't sure if that's what caused the bridge to fall.
但研究人员说,他们从来没有见过一个医学治疗增加因子IX到达过新试验中看到的水平。
But researchers said they have never seen a medical treatment boost factor IX to the level seen in the new trial.
有八种不同形式的维生素E,但研究人员认为,只有一种α-生育酚有助于满足人类的营养需求。
There are eight distinct forms of vitamin E, but researchers believe that only one type, alpha-tocopherol, helps meet human nutritional needs.
尽管MC1R是正常人类色素沉着的关键基因,但研究人员认为其他基因的作用也会影响人的头发和皮肤着色。
MC1R is a key gene in normal human pigmentation, yet researchers believe that other genes also contribute to a person's hair and skin coloring.
但研究人员预测,城市扩张和土地价格上涨将导致6降至2031%,同时失去产量和就业机会。
But researchers have predicted urban sprawl and rising land prices will lead this to drop to 6% by 2031, losing both produce and jobs.
据估计,每年有800万吨塑料进入海洋,但研究人员只能追踪到其中的1%。
An estimated 8 million tons enter the ocean every year,yet researchers can only account for 1 percent of that.
NASA的目标是找到90%的近地天体,但研究人员预计这款望远镜只能找到约75%。
NASA's goal is to find 90% of NEOs, but researchers expect the telescope to find only about 75%.
没有人确定是什么导致加利福尼亚的蝴蝶消失,但研究人员已经确定了几个可能的促成因素。
No one is certain what is causing butterflies in California to disappear,but researchers have identified several likely contributing factors.
这些网站询问他们是否需要帮助,但研究人员说,这些平台提出了是否需要更严格的监管的问题。
The sites flash up a question asking if they need help, but researchers say the platforms raise question about whether tougher regulation is required.
但研究人员一直在努力识别更多的致癌基因,进而通过Ⅰ阶段临床试验开发新的靶向疗法。
But researchers are constantly working to identify more cancer-causing genes and, in turn, develop new targeted therapies through Phase I clinical trials.
科技公司已收紧政策,以消除虚假账户,但研究人员表示,它们的平台永远是影响力宣传的沃土。
Technology companies have toughened policies to eliminate fake accounts,but researchers say their platforms will always be fertile ground for influence campaigns.
关于用手的神话年复一年地出现,但研究人员还没有发现所有左撇子意味着什么。
Myths about handedness appear year after year, but researchers have yet to uncover all of what it means to be left-handed.
肥胖、吸烟和缺乏身体活动可以缩短端粒长度,但研究人员发现,增加维生素D水平克服了这些影响。
Obesity, smoking, and lack of physical activity can shorten telomere length,but researchers found that increasing vitamin D levels overcame these effects.
此前,研究人员利用实验室X光检查轴承,但研究人员只能探测轴承内部200微米的厚度。
Previously, researchers used laboratory X-ray inspection of bearings, but researchers could only detect the thickness of the inside of the bearing by 200 microns.
糖尿病占更多的美国死亡比以前思想,但研究人员估计,治愈糖尿病会整体死亡人数减少12%.
Diabetes accounts for more US deaths than previously thought but researchers estimate that a cure for diabetes would cut overall deaths by 12-percent.
迄今为止的初步研究表明,植入的干细胞通常不会促进癌症,但研究人员希望做更多的工作来确定。
Preliminary studies so far suggest that the implanted stem cells don't usually promote cancer,but researchers want to do more work to be sure.
较小的颗粒可能会穿过消化道的壁并被困,但研究人员认为它们不太可能以有害的量累积。
Smaller particles could potentially pass through the walls of digestive tracts and get stuck,but researchers believe they are unlikely to accumulate in harmful quantities.
据估计,每年有800万吨塑料进入海洋,但研究人员只能追踪到其中的1%。
It is estimated that 8 million tons of plastic enter the ocean every year,but researchers can trace only 1% of it.
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