[問題] 98年導遊領隊英文試題

[chwuuu (chwuuu)]

閱讀測驗描述旅客撘飛機時,因路途長時間久,於是有一句:

Some people's circadian rhythms are so severely disrupted that they are on the brink of true depression.

請問此句中, true depression作何解釋呢?

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