Regular buffing helps prevent nails from splitting.经常抛光保养指甲可以预防指甲劈裂。He was already buffing the car's hubs.他已经在擦汽车轮毂了。The buffing wheel can avoid the hazardous process of polishing medium painting.该抛光轮可避免涂抹抛光介质这一危险工序...
China was the first country in the world to synthesize crystalline insulin, a bioactive protein.中国在世界上最早用人工方法合成一种有生物活力的蛋白质--结晶胰岛素.Microorganisms can produce many beneficial bioactive substances through secondary metaboli...