black cloud

基本解释

You see this dark black cloud hovering over the surface of Earth?
能看見這磐鏇在地表的深黑色的雲嗎？
While I knew I shouldn’t let it, the mailman’s morning delivery of another rejection letter for an article I’d submitted to a magazine made me feel like a black cloud of failure hung over my head.
雖然我知道自己不該這樣，但是早班郵差送來的又一封我給襍志投稿的退稿信就象是一片失敗的烏雲掛在我的頭頂上。
From the plane, you could see the vast black smoke-cloud that used to be Japan's biggest oil refinery, still burning unstoppably 24 hours after the earthquake hit it.
從飛機上鳥瞰，你可以看到從日本這個曾經最大的鍊油廠內冒出的滾滾濃菸，在地震發生後的24小時裡廠內的大火一直沒有停止過燃燒。

Another longer-term structural black cloud looming over the U.S. Treasury market remains the huge budget deficit.
FORBES: Fed Watch 2012: What Does Ben Have Up His Sleeve Now?
For some investors, the stock market has a permanent black cloud over it.
FORBES: Greed is Good; Fear is Better
The black cloud is that a war which has already killed about 55, 000 people, soldiers and civilians together, shows no signs of ending.
ECONOMIST: Sri Lanka