1. ATP (adenosine triphosphate) is a molecule that stores and provides energy for cellular processes.
（腺苷三磷酸（ATP）是一种储存并提供细胞过程所需能量的分子。）

2. Phosphocreatine (PCr) is an energy-rich compound formed by the accumulation of creatine phosphate and used to regenerate ATP stores in muscle cells.
（磷酸肌酸（PCr）是一种富含能量的化合物，由肌酸磷酸盐积累而成，用于在肌细胞中再生ATP储存。）