All very interesting, Sherlock, but the terror alert has been raised to critical.

——Sherlock

一切都很有意思，夏洛克，但恐怖襲擊預警等級已達到"危急“。

——《神探夏洛克》

一、關于critical，你應該知道的用法有

adj.

1.緊要的，關鍵性的，決定性的?extremely important because a future situation will be affected by it

We are at a critical time in our history.

我們正處于歷史的緊要關頭。

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2.評判性的，審慎的?involving making fair, careful judgements about the good and bad qualities of sb / sth

He has recently published a critical work with Oxford University Press.

他最近在牛津大學出版社出版了一本評論著作。

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3.批評的，挑剔的?inclined to criticize severely and unfavorably

The director is always very critical of employees' work.

主任總是對員工的工作提出批評。

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4.危急的，嚴重的?serious, uncertain and possibly dangerous

Its day-to-day finances are in a critical state.

其日常財務狀況十分糟糕。

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5.臨界的?being in or approaching a state of crisis

Pesticide persistence beyond the critical period for control leads to residue problems.

農藥一旦超過控制的臨界期，就會導致殘留問題。

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二、詞義辨析：哪些詞匯能表示“緊急的”

critical, acute, urgent

這些形容詞均有“緊急的”或“嚴重的”之意。

critical指極為危急或缺乏的狀況，而這種狀況標志一種轉折點。

acute通常指需要和缺乏的緊急程度。也指病情的嚴重。

urgent指情況緊急，急需解決問題。

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三、下面我們來學習一下含有critical的常見短語

critical point

臨界點

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critical angle

n.[物][空]臨界角

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critical mass

群聚效應?

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四、最后，做個填詞游戲吧

The first 24 hours after the operation are the most ________.
病人手術后頭 24 小時是最危險的。?