It was published in the "Annals of Internal Medicine".它发表在《内科医学年鉴》上。His deeds went down in the annals of British history.他的事迹已载入英国史册。This was the greatest event in the annals of European integration.这是欧洲统一史上最重大的事件....
在所有简单无害的娱乐项目背后都隐藏着危险，特别是对儿童而言。Under all the innocent fun, there are hidden dangers, especially for children.该行业一直在努力开发一些可以替代这些气体的无害物质。Industry has been working at developing harmless substitutes for these gases.棕榈油对环境无害。...