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。