英语词汇will be effective only if in writing and signed by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	will be effective only if in writing and signed by
释义	be effective [idiom.]— 行之有效 in writing adv — 以书面 adv by and by — 回头 if and only if — 若且唯若 • 当且仅当 will be v — 将是 v be in — 处 • 在于 if only — 只要 • 庶几 • 嘦 only if conj— 只有 adv
随便看	ecological range ecological raw material ecological reasons ecological recovery ecological reform ecological regions ecological Regulations ecological regulations ecological rehabilitation ecological relations ecological relationships ecological relevance ecological requirements ecological research ecological reserve ecological resilience ecological responsibility ecological restoration ecological risk assessment ecological river ecological role ecological safety ecological sanitation ecological scarcities ecological science

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。

be effective [idiom.]—