upon的用法

联合国救助队已安全撤离霍姆斯An aid convoy delivering humanitarian supplies to the Old City of Homs inSyria has left safely after it was fired upon by unidentified gunmen.The UN and Syrian Arab Red Crescent convoy had com

criteria是什么意思？n. 标准，准则（criterion的复数形式）They commonly focus attention upon easily recognizable criteria of action. 它们通常把注意力集中在作用的易于识别的尺度上。He describes several of the important desig

Successful people understand that their success starts and ends with their own mental and physical health, and that its almost entirely dependent upon them getting enough sleep. Thats why bedtime routines are a key ritua

CCTV9英语新闻：都伯林人争取破人数最多合唱歌曲世界纪录Dubliners aim for Guinness world record for charityMeanwhile, on the holiday season which is very close upon us - the Christmas spirit was heightened in Ireland when c