英语词汇up to a concentration怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	up to a concentration
释义	up to — 到 adv • 以至 • 以致 • 以至于 concentration n — 集中 n • 浓度 n • 含量 n • 浓度 n concentration — 浓缩 • 凝缩 up — 向上 • 攲 up n — 起伏 n up to prep — 及 prep
随便看	one-part silicone one party one-party dictatorship one party fails to one party may one party rule one-party system one-pass printing one patient showed one payment one pending one penny one perceives one percentage change one-percentage point one per cent. higher one per cent increase one per customer one per each one period model one per line one per month one per quarter one personal information one person alone

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

up to —