It is because one type of radiation emitted by the sun, ultraviolet (UVR), is believed to cause genetic changes in the developing baby that may have a shaping effect, either beneficial or harmful.
因为，太阳所发出的一种光线叫作紫外线（UVR），它可以造成胚胎期的婴儿的基因变化，从而造成可感知的后果，这种后果有好有坏。
The origin of thermoelectric effects and the cause of no thermoelectric effect in type -i superconductors were discussed.
讨论了温差电效应的起源和I类超导体不发生温差电效应的原因。
This type of study design, known as "case-control," cannot prove cause-and-effect.
这种类型的研究被称为病例对照研究，它不能够证明两者之间的因果关系。
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