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、退避和调解对物理访问类似低级协议是据链路一部分。

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人，他们就像我们走了一样。 我们无法处理。 我尊重他们诚实。