cells affected by mutation受到突变影响的细胞Scientists have found a genetic mutation that appears to be the cause of Huntington's disease.科学家们已经发现了一种可能是引起亨廷顿舞蹈病的基因变异。This mutation makes it better adapted than the other four....
I press the thumbtack into the board with thumb.我用大拇指将图钉按在木板上.The thumbtack pricked his index finger.大头针扎了他一下手指.He pinned up the notice with a thumbtack.他用图钉将通知挂起来....