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? under way: in process。 in progress under repair under construction 2. knock down : destroy by means of blows These old houses are to be knocked down. These machines will be knocked down. knock sb. down : strike to the ground or floor He was knocked down by a busy. He knocked his opponent down. 3. pull down : knock down, destroy or demolish It is easier to pull down a house than to build one. pull sb. down : weaken, lower the spirits of A attack of influenza soon pulls you down. 4. th