He shifted his weight and a twig snapped.他挪了一下身体的重心，一根树枝咔嚓一声断了。As the twig is bent so the tree is inclined.从小偷针,长大偷金.The sharp sound of a twig snapping scared the badger away.细枝突然折断的刺耳声把獾惊跑了....
He has received extensive corrective surgery to his skull.他的头骨做过大面积的矫形手术。This type of surgery could even be used to extract cancerous growths.这种外科手术甚至可以用来切除癌性肿瘤。He needed surgery to cure a troublesome back injury.他需要做手术来...