Flavin: Any of a class of organic compounds, pale yellow biological pigments that fluoresce green.黄素: 一组浅黄 、 绿萤光生物色素,在植物和动物组织中分布很广,含量少.The cheaper FNDs fluoresce roughly as well as those produced with an electron beam.此种...
You have done a brave act and you will hear about it.你干了一件勇敢的事,你将会受到奖赏的.You always hear about planes being delayed because of technical faults.你总能听到由于技术事故而使飞机迟期起飞的事.What you hear about may be false; what you see is true....
The school in Poldown was not big enough to accommodate all the children.波尔登的学校不够大，容不下所有的孩子。He told her how the boys in East Poldown had set on him, teasing him.他告诉她东波尔顿的男孩们是如何攻击他、嘲笑他的。...
We are here to protect and assist the weak and infirm.我们来这里保护、帮助年迈体弱者。The public is urgently requested to assist police in tracing this man.紧急要求公众帮助警方追踪此人。The Authority will provide a welfare worker to assist you.当局会派一名义...