如何使用 "challis" 造句
- 1. Professor lawrie challis , an emeritus professor of physics who has led the government 's mobile-phone safety research , says that parents should not give children phones before secondary school .
- 一个领导政府的移动电话安全研究的荣誉退休的物理学教授lawriechallis说，在孩子上中学之前，父母不应该给他们的孩子使用手机。