maintenance of life meaning in English

生活保养

Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals , including man
维生素是有机化合物，饮食中必须含有少量部分以维持动物（包括人）的生存和生长。
The complex of physical and chemical processes occurring within a living cell or organism that are necessary for the maintenance of life . in metabolism some substances are broken down to yield energy for vital processes while other substances , necessary for life , are synthesized
新陈代谢维持生命所必需的，发生于存活细胞中或生物体中的物理和化学过程的总和。在此过程中，一些物质被分解从而为生命过程提供能量，而另一些维持生命所必需的物质则被合成