... particulate technology 微粒工艺学 parts per hundred million 亿分率 parts per million ppmn百万分率 ...
2
?一亿分之几
... 十亿分之几 ppb parts per billion 一亿分之几parts per hundred million 亿分之几 partper hundred million ...
原声例句
1
Breathing in two hundred parts per million of carbon monoxide will cause the first signs of poisoning.
VOA : special.2011.01.25
2
Until this past month, the safety standard for consumer paints was six hundred parts per million.
VOA : special.2009.08.31
3
"Most of the paint brands that we looked at had at least one sample that was above ten thousand parts per million, which is over a hundred times the current U.S.standard."