同步數位階層

synchronous digital hierarchy / SDH

like / same / similar / together / alike / with

see 衚衕|胡同[hu2 tong4]

synchronous / to synchronize / to keep step with

surname Bu

a step / a pace / walk / march / stages in a process / situation

to count / to count as / to regard as / to enumerate (sb's shortcomings)

number / figure / several / CL:個|个[ge4]

frequently / repeatedly

digit / (Tw) digital

position / location / place / seat / classifier for people (honorific) / classifier for binary bits (e.g. 十六位 16-bit or 2 bytes) / (physics) potential

rank or step / stairs

hierarchy / stratum / social class

social class

to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers