| 释义 |
ppt. abbr.precipitate ppt, ppt. abbr. parts per thousand 千分率,千分之… parts per trillion [美国英语]万亿分率,万亿分之… 以上来源于:《21世纪大英汉词典》 ppt.abbr.(縮寫 abbreviation)千分之…(= parts per thousand)萬億分之…(= parts per trillion)【化】(= precipitate)ppt.parts per thousand千分之…parts |