at the merce of
vital
trial
glitch
scratch
make the best of
make the most of 
acronym  n.首字母简略词
antonym  n.反义词
synonym  n.同义词
abbreviation : n.缩写词 Jan is the abbrevation of January
fraud:   n欺骗欺诈
petition: n.请愿书
faculty: n.才能, 本领, 能力, 全体教员, (大学的)系, 科, (授予的)权力
facility  n.容易, 简易, 灵巧, 熟练, 便利, 敏捷, 设备, 工具
stuff
staff
simulation
aggregate  聚集, 集合, 合计
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