单词	F1 layer
释义	F1 layer noun ˈef-ˈwən-  : the lower of the two layers into which the F region of the ionosphere splits in the daytime that occurs at varying heights from about 80 to 120 miles (130 to 200 kilometers) above the earth's surface Word History First Known Use 1933, in the meaning defined above
随便看	firesides firestone firestones firestorm firestorms firetail firethorn firethorns firetop firetrap firetraps firetrucks firewalk firewalking firewalks firewall firewalled firewalling firewalls firewater firewaters fireweed fireweeds firewheeles firewheels

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。