There is not a shadow of a doubt that they did it.
毫无疑问，是他们干的。
灵活说英语
某事确定或可能发生
📚 句中词汇解析
从本句中提取的重要词汇
n. 怀疑，疑虑;未确定;
vt. 怀疑，疑惑;
vi. 不确定，不能肯定或怀疑;
💡 doubt二→二种状态→怀疑
"a feeling of doubt and uncertainty"
迟疑不定的感受
近义：disbelieve, hesitation, hesitate, mistrust, question, stagger
反义：prove, reassure, verify, vouch, check, demonstrate
n. 阴影;影子;鬼，幽灵;隐蔽处;
vt. 投阴影于;使朦胧;跟踪，尾随;预示;
vi. 渐变;阴沉;
adj. 影子内阁的;阴影的;非正式的;
💡 老大(ad)在展示(show) 阴影
"Please stand to one side; you're casting your shadow over my work."
请你往边上站一站, 你挡着我的光线了.
近义：sadden, darken, trail, obfuscate, obscure, shade