Do not use if the ring is broken or missing.
不要使用，如果戒指是损坏或丢失。
The maintenance algorithm must be invoked, if the logical ring of the token bus LAN is broken.
在令牌总线局域网络中，当逻辑环被破坏时，就要运行逻辑环维护算法。
As is shown in the picture, the shortest board decides the capacity of the wooden barrel, and the broken ring makes the iron chain bear the weight that it should have done becoming impossible.
简要描述图画表面信息，作者采用的写作方法是翻译了图片左下角的中文提示语——一只木桶，最短的一片决定其容量；一根铁链，最脆弱的一环决定其强度。
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