单词：per-
[医] 过, 高, 超, 经, 通; 极, 甚
A prefix used to signify through, throughout, by, for, or as an
intensive as perhaps, by hap or chance; perennial, that lasts
throughout the year; perforce, through or by force; perfoliate,
perforate; perspicuous, evident throughout or very evident; perplex,
literally, to entangle very much.
Originally, denoting that the element to the name of which it
is prefixed in the respective compounds exercised its highest valence;
now, only that the element has a higher valence than in other similar
compounds; thus, barium peroxide is the highest oxide of barium; while
nitrogen and manganese peroxides, so-called, are not the highest oxides
of those elements.
intensive as perhaps, by hap or chance; perennial, that lasts
throughout the year; perforce, through or by force; perfoliate,
perforate; perspicuous, evident throughout or very evident; perplex,
literally, to entangle very much.
Originally, denoting that the element to the name of which it
is prefixed in the respective compounds exercised its highest valence;
now, only that the element has a higher valence than in other similar
compounds; thus, barium peroxide is the highest oxide of barium; while
nitrogen and manganese peroxides, so-called, are not the highest oxides
of those elements.
词型变化：名词复数形式 : spsesrs-s
per-的用法和样例：
词汇搭配
- per rail由铁路
- per cent 百分之 ...
- per unit每单位
- per se（固定词组）本身...
- per os经口,口服
- per hour每小时
- per mil每千
- per curiam[法] 依法院, 由...
- per diem<拉>每日
- per head每人
- per rectum经由直肠,经结肠,经...
- per annum每年地
- per shift每班
- per capita人均
- per mill每千
- per day每日(每天)
- a hundred per cent恢复健康
- as per usual照常(照例)
- as per按照
- one hundred per cent百分之百