grow gray meaning in Chinese

在革一岗位上长期任职，变白，变老

A fox may grow gray , but never good
狐狸善变，本性难移。
Mignon , a very tall , very broad fellow , with the square - shaped head of a strong man at a fair , was forcing a passage through the midst of the groups and dragging on his arm the banker steiner , an exceedingly small man with a corporation already in evidence and a round face framed in a setting of beard which was already growing gray
米尼翁是一个身材高大宽肩的汉子，长着一个江湖艺人的方形脑袋，他从人群中挤出来，挽着银行家斯泰内的胳膊斯泰内身材矮小，大腹便便，面孔圆圆的，下颔和两颊上长着一圈灰白络腮胡子。
But the first step he made wrung such a hideous creak from the crazy floor that he sank down almost dead with fright . he never made a second attempt . the boys lay there counting the dragging moments till it seemed to them that time must be done and eternity growing gray ; and then they were grateful to note that at last the sun was setting
可他一迈步，那摇摇晃晃的破楼板就吱吱作响，吓得他立即趴下，像死了一样，他不敢再动一下，两个孩子躺在那里一分一秒地数着时间，似有度日如年之感，最后他俩觉得日子终于熬到了头，看到日落西山，心中充满感激之情。