他们认为她杀了她丈夫,但他们没有确凿的证据。

They think she killed her husband, but they have no concrete evidence.

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They think she killed her husband, but they have no concrete evidence.

concrete 的本义是"混凝土",引申为"具体的、实在的、明确的",因为混凝土是坚固可见的物质。在这里表示"确凿的、不容置疑的"证据。

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