接二连三的震动通常但并不一定就是火山喷发即将来临的信号。
Swarms of tremors are usually, though not always, a sign that an eruption is coming.
从长远来看，为了维持其经常项目逆差，美国将会付出更大的代价，这是熊市来临的信号。
In the long run, this could mean that Americans would have to pay more to finance their current-account deficit-a bearish sign.
地震云是指那些可以作为显示地震即将来临的信号的云彩。
Earthquake clouds are clouds claimed to be signs of imminent earthquakes.
地震云是指那些可以作为显示地震即将来临的信号的云彩。
Earthquake clouds are clouds claimed to be signs of imminent earthquakes.
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