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大象传媒 Q&A of the Week “你问我答”：近义词辨析：erratic、volatile、mercurial、capricious、fickle
How do we use 'erratic', 'volatile' and other words related to unpredictability? Listen to find out
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大象传媒 Authentic Real English “地道英语”：Give it some welly! 加把劲呀！
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