1.MAC addresses, collision detection, exponential backoff and similar low level protocols that mediate access to the physical layer are part of the Data Link Layer.

MAC 地址、冲突检测、指数退避和调解对物理层的访问的类似低级议是数据链路层的一部分。机翻

2.Considering the backoff algorithm of S-MAC protocol cannot resolve the fairness problem for nodes communication, the BDQR (Backoff Depends on Queue and Retry) backoff algorithm was presented in this paper.

鉴于S-MAC议的退避算法无法解决节点通信中的公平性问题，本文提出了BDQR（基于队列和重试的退避）退避算法。

3.Number one category is of the people who see  you in the misery in pain and the backoff, they're like we are gone. We can't handle  it. I respect them for their honesty.

第一类是那些在痛苦和退缩中看到你的人，他们就像我们走了一样。 我们无法处理。 我尊重他们的诚实。机翻