英语词汇optional rate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	optional rate
释义	optional rate operationaladj. 即可使用的 (用于)操作的, 经营的 proportionateadj. 成比例的;均衡的;相称的 rationalizationn. 合理化 occupationaladj. 职业的 oppositionaladj. 反对的,对抗的
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英汉双解词典包含3607232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。