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随便看	whether or not whet one's appetite whets whet someone's appetite whetstone whetstones whetstones-park whetted whetter whetter whet the appetite of whetting whew whewer whey whey-faced wheylike which whichaway which-a-way whichever whichever comes to hand which is which which is which which-like 为什么树干要长成圆柱形? 为什么树干都是圆的? 为什么树怕剥皮? 为什么树怕"剥皮"? 为什么树木不喜欢知了为什么树木会有年轮为什么树木可以保存为化石为什么树木年轮线的间距大小不等? 为什么树根能把水送上树梢为什么树芽不怕寒冬? Wintersportort Winterstollen Wintersturm Winterurlaub Winterweg Winterzeit Winterzeit Winteröl Winzer winzig