This is the 6128th most frequent Chinese word.
層及
"層及" means "level and reach" or "extent across levels."
This sentence uses "層及" to indicate layers or levels in the architectural context.
這棟建築物包含了數不清的層及。
This building includes countless layers and levels.
Here, "層及" refers to different strata or levels in the societal context.
教育改革需要深入到每一層及中。
Educational reforms need to reach every stratum and level.
In this case, "層及" is used to denote levels or tiers within an organizational structure.