His son sat still, face frozen, lips pressed in a line, white-knuckled hands clasped on the table . 他儿子坐着一动不动,面孔冷酷,紧闭着嘴唇,他那双白皙的,关节明显的手紧握着放在桌上。
These pipes have strong gutta-percha articulations, so that the oscillations of the balloon may have no effect on them . 这些管子隔一段距离就装有结实的橡皮关节,这使它们能够经受住气球的摆动。
When a patient needs to use a kidney machine, surgeons stitch a small tube into a suitable place in his body--usually either in his forearm above the wrist or in his leg . 当患者需要使用人工肾时,大夫在患者身体的适当部位,一般是在腕关节的前胳臂和腿上插入一个小管子。