一个人的幼儿时期,其实就是一种不断习得能力的过程,这个周期性的刺激,将带给儿童无限的欢乐和乐趣。
皮革行业必须进化,否则就有被淘汰的风险。
The tools we use to detect exoplanets are constantly evolving, pushing the boundaries of what we thought was possible.