IHD=International Hydrological Decade 国际水文十年(计划)Ipron.我I am a buzzing bee.我是只嗡嗡的小蜜蜂.I have two suitcas.我有两个手提箱。I'm scared of mice.I'm paying tonight.I've got toothache.I am sorry for her.我为她感到难过。I tidy up the room.我清理房间。I TTL Time To Live.在对方的系统里停留的时间。I'm on a tight budgetI obeyed from fear.我因惧怕而屈服。