lackluster

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乏味的（形容詞）

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(adjective) Lacking vitality or brilliance, usually because of a lack of effort. (NOTE: British spelling: lacklustre).

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EXAMPLE: The audience was disappointed and rather angry when the famous musician performed in a lackluster manner after arriving late for the concert.

音樂會(huì)上,，這位著名音樂家演出遲到,，表演平淡乏味，觀眾深感失望和氣憤,。

the kiss of death

致命一擊（傳統(tǒng)表達(dá)法）

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Traditional expression describing something that is the final action before something collapses or otherwise ends; a fatal act.

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EXAMPLE: The embezzling scandal involving our chief accountant was the kiss of death for our financially troubled company, and it closed within a few months.

對(duì)我們這家財(cái)務(wù)陷入麻煩的公司來說,，這起牽涉到我們的首席會(huì)計(jì)師的貪污丑聞是致命一擊，沒過幾個(gè)月,，公司就倒閉了,。