The rapid spread of obesity is analogous to the spread of an infectious disease, and the viral etiology of obesity is appealing as an explanation to the public health crisis.
2
他后来又解释道,这个空间的点睛处,在于它的灵活性:可回缩的墙体,可移动的舞台,还有可升降的观众席。
The beauty of the space, he explained, is its flexibility: the walls retract, the stage moves and the tiers of seats can be hoisted.
3
这种作用解释了为什么看起来玻璃杯中的吸管在水面处弯曲。
This effect explains why a straw in a glass of water appears to bend at the surface of the water.