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1.because of 由于
例句：It is mainly because of my fault.
这主要是由于我的过错。
2.artificial limb 假肢
例句：They said their set-up could someday be adapted to help disabled people operate a motorized wheelchair or artificial limb.
他们说，试验中的这种装置日后将会投入应用，以帮助残疾人驾驶机动轮椅和操纵假肢。
3.carbon-fibre 碳纤维
例句：In its untreated state the carbon fibre material is rather like cloth.
原始的碳纤维材料很像布料。
4.keen on 满怀热情的
例句：I wasn't too keen on physics and chemistry.
我对物理和化学不是太感喜爱。
