求翻译：能量是人体维持生命活动必不可少的，碳水化合物是人类生存的基本物质和能量主要来源；钙是人体骨骼和牙齿的主要组成成分，许多生理功能也需要钙的参与；维生素D有助于骨骼和牙齿的健康，可促进钙的吸收；烟酸有助于维持皮肤和粘膜健康，是能量代谢中不可缺少的成分。是什么意思？

The energy of the body to maintain essential activities of life, carbohydrates are the basic material of human survival and the main source of energy; calcium is the major components of human bones and teeth, many physiological functions also require the involvement of calcium; vitamin d helps bones

Energy is the human life-sustaining activities essential to the survival of the human race, carbohydrates are the basic material and energy; calcium is mainly from human bone and teeth of the main constituents, and many physiological functions of calcium is also required to participate in and contri

The energy is the human body maintenance vital activity essential, the carbohydrate is the human survival basic material and the energy main origin; The calcium is the human body skeleton and the tooth main component, many physiological functions also need the calcium the participation; Vitamin D is

Energy is the life-sustaining activities essential to the body, carbohydrates are the basic substances of human existence and the main source of energy; calcium is the main component of human bones and teeth, and participation of many physiological functions also need calcium vitamin d helps healthy