海面突然退去并不是普通潮汐,而可能是海啸来临的预兆。Hǎimiàn tūrán tuìqù bìng bú shì pǔtōng cháoxī, ér kěnéng shì hǎixiào láilín de yùzhào.The sudden retreat of the sea is not an ordinary tide, but may be a sign of an approaching tsunami.
大雁提前南飞是寒冬将至的预兆。Dàyàn tíqián nánfēi shì hándōng jiāng zhì de yùzhào.Wild geese flying south early are an omen that a harsh winter is coming.
这种反常的天气预兆着气候的变化。Zhè zhǒng fǎncháng de tiānqì yùzhào zhe qìhòu de biànhuà.Such abnormal weather foreshadows changes in the climate.