英语词汇optionally up to 50 km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	optionally up to 50 km
释义	optional — 任择 adj • 可选的 adj • 选配 adj • 选购 adj • 自选 up to — 到 adv • 以至 • 以致 • 以至于 km— 公里 149,567,892 km— 天文单位 up — 向上 • 攲 up n — 起伏 n up to prep — 及 prep
随便看	cause people cause permanent damage cause personal injury cause personal injury and damage cause physical pain cause pollution cause potential harm cause prejudice cause prejudice to a person cause premature wear cause prices cause problems for cause profit cause public disturbance cause quality cause questions cause quite a stir cause radio interference cause real damage cause reddening. cause refugee cause-related cause related marketing cause relationship cause relaxation

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。

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