以镜像方式对称的分子通常会具有不同的性质，于是研究人员利用这种“手性（chirality，译注：指分子的左/右手螺旋性质）”来设计新药物。

Molecules often come in mirror images that can have different properties, and researchers take advantage of this "chirality" to design new drugs.

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但调查人员发现，这起事故有可能是一个严重的非对称推力（具体指两台发动机推力不同）问题造成了左滚，导致飞机失去控制。

The investigators found that the circumstances of this accident indicate that a severe asymmetric thrust condition caused a left roll that led to loss of control of the airplane.

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DHF是指有心衰的症状和体征而左室收缩功能正常(射血分数大于45%)。

DHF occurs when signs and symptoms of heart failure are present but left ventricular systolic function is preserved (i. e. ejection fraction greater than 45 percent).

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There is a crossover and this is important when we think about the studies that will follow but the crossover is that everything you see in the left visual field goes to the right side of your brain; everything in the right visual field goes to the left side of the brain, and similarly, there's a crossover in action.

大脑中存在着交叉,这对于我们考虑下面的一些相关研究,是非常重要的,交叉是指呈现于你左视野中的刺激,会投射到你的右脑,呈现于你右视野中的刺激,会投射到你的左脑,同样,行为上也存在着交叉的关系

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