推波助瀾 [ㄊㄨㄟ ㄅㄛ ㄓㄨˋ ㄌㄢˊ; tui1 bo1 zhu4 lan2] to push the wave and add to the billows (idiom); to add momentum to encourage sth to get bigger to add fuel to the fire ◄ ►
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