各负责另一人安全的两人同行制
A two-person system in which each person is responsible for the safety of the other
以上为机器翻译结果，长、整句建议使用 人工翻译 。
可以把这种对应看作是各负责另一人之安全的两人同行制，每一个自然数都与某个正分数配对，反之亦然。
You could think of this correspondence as a buddy system in which each natural number is paired with some positive fraction, and vice versa.
youdao
应用推荐
模块上移
模块下移
不移动