organ system短语¹⁴⁴⁹⁷²⁺² 基本例句 器官系统 Fitness is a concept that expresses the adaptability of human physical function to the environment and also an important standard for measuring various qualities of an organ system. 体适能是反映机体对外界环境适应力的重要概念，是衡量机体各项素质的重要指标。 chemyq