fragile adj.易碎的,脆的
例句:Glasses are fragile and must be handled with great care.
玻璃制品易碎,必须小心轻放。
fragments n.碎片,断片,片段。
例句:Carry dropped the vase on the floor and it broke into fragments.
凯丽把花瓶掉在地上,摔成了碎片。
fraction n.小部分,片断,分数
例句:She has done only a fraction of her homework.
她只做了家庭作业的一小部分。
friction n.摩擦,摩擦力
例句:Friction against the rock combined with the weight of the climber,caused his rope to break.
与岩石之间的摩擦加上攀登者的重量,使得绳子断了。
fracture n.破裂,骨折v.(使)破碎,(使)破裂
例句:Fracture of the leg can be very serious in elders.
老年人腿骨骨折有可能成为严重疾患。
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