chronologically

Arranged chronologically, it begins with the novel’s primordial period — everything up to 1800 — and then marches century by century into the present.

按年代排列，它开始于小说的产生时期--一切回溯到1800年--然后一个世纪一个世界的进行到现在。

This means that data may appear two or more times in the log, but as the log is chronologically advancing, the most recent data is viewed as the active data.

这意味着数据可能在日志中出现两次或更多次，但是由于日志是按时间先后顺序发展的，最近的数据被视作活动数据。