The foreword generally describes Jameson's academic career and then draws main part. "“前言 ” 概述杰姆逊的学术生涯,并引出本文论题.Considering that he started with $ 5,000 Mr Jameson is making tracks.詹姆森先生仅以5,000美元起家,从这一点上考虑,他可真是发展迅速.T...
Radioactivity is the ejection of particles or radiation from the nucleus.放射性是原子从核中射出粒子或辐射的现象.Most of the crater is formed by ejection.大多数的弹坑是由于把泥土抛出而形成的.A rocket is propelled by the ejection of a portion of its mass to t...