population scientist英美[网络] 人口科学家网络双语例句'We have created a system where we are testing these chemicals out on the human population,' scientist Thomas Zoeller told Bloomberg.我们已经创建了一个系统用来检测这些化学物质对人体的影响,科学家托马斯卓勒告诉彭博新闻社,我当然非常希望它们都是安全的。