英语词汇is useful when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	is useful when
释义	useful adj — 有用 adj • 有用的 adj • 有益 adj • 好用 adj • 管用 adj • 顶事 adj be v — 有 v • 是 v • 当 v • 成为 v • 做 v • 存在 v • 属 v • 乃 v • 乃是 v when — 时 • 一旦 • 曷 when conj — 如果 conj • 当...时 conj • 既然 conj • 考虑到 conj when?— 什么时候 • 几时 • 何日 • 几点 • 多早晚
随便看	used instead used instead of reign name by the nationalist Government, then by taiwan used instead of reign name by the nationalist government, then by taiwan used instead of reign name by the nationalist government, then by Taiwan used instead of reign name by the nationalist Government, then by Taiwan used in subsequent used in such a way used in support of used in taoist charms used in teaching used integrally used intelligently used intensively used inter alia used interchangeably used interchangeably with used in testing used in the evening used in the first place used in the manufacture used in the presence of used in the synthesis used in the transliteration of people's names used in this used in trade

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。

useful adj —