spare unit

• 备用部件,备用设备,备用机组

spare unit的用法和样例：

例句

1. In this new field, doctors have joined forces with engineers and biochemists to assemble living cells into spare parts for the human body.
   在这一新领域，医生与工程技术人员和生物化学家齐心协力把活细胞装配成人体的备用部件。