成功不是终点，失败也并非末日，最重要的是继续前进的勇气。Success is not final, failure is not fatal: it is the courage to continue that counts.--Winston Churchill与其对你现在所处的位置感到失望，不如乐观地想想你前进的方向。Instead of being disappointed at where you are, think opt...
The mechanism of the surface colouration of the flame - retardant nylon product and its application are introduced.介绍阻燃尼龙制品表面着色的机理及其应用.The developments of technologies for plastics colouration with colour master - batche...
The smooth surface of the lake reflected the bright full moon.平静的湖面反映出明亮的圆月。A crescent moon peeped out from behind the clouds.一弯新月从云中出现....the first man on the moon...登上月球的第一人The moon waxes and wanes every month.月亮每个月都有圆...