In its untreated state the carbon fibre material is rather like cloth.原始的碳纤维材料很像布料。If left untreated the condition may become chronic.这种病如果不治疗可能会发展成慢性病。If untreated, the illness can become severe.若不加以治疗，病情就可能会变得很严重。...
Mother ran round the room shaking up all the cushions when the doorbell rang.母亲正在屋里跑来跑去忙着拍松所有的坐垫, 这时门铃响了。Best suitable for stitching tents, seat cushions , horse gears, and gunnysacks, cars seaming and so on.适用于帐篷, 坐垫, 抛...