电离层反射电波的能力取决于不同高度上电子密度的正常差别。
The ability of the ionosphere to reflect these waves is dependent upon normal variations in the electron density at different levels.
科学家们已经发现那些有同胞兄妹患有精神分裂症的人们脑电图波形与正常人之间的细微差别。
Scientists have found that a type of EEG (electroencephalography) brain wave is slightly different in people who have siblings with schizophrenia, compared with that seen in the general population.
在这种更为有利的环境中,细胞发育正常进行。这位妇女怀上了三胞胎,胎儿携带着她和她丈夫两人的DNA——这跟其他正常的婴儿没什么大的差别。
In this more benign environment, development proceeded normally, and the woman became pregnant with triplets who carried a mix of her DNA and her husband's — pretty much like any normal baby.
So now somebody can get an artificial hip and they can live for many decades with it and have almost full function of that hip over that period of time.
所以现在患者可以使用人造髋关节,再活上几十年,而且几乎和正常人没一点差别
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