齊格菲防線

Siegfried Line, line of German military defenses during WWI and WWII

square / frame / rule / (legal) case / style / character / standard / pattern / (grammar) case / (classical) to obstruct / to hinder / (classical) to arrive / to come / (classical) to investigate / to study exhaustively

to protect / to defend / to guard against / to prevent

abbr. for the Philippines 菲律賓|菲律宾[Fei1 lü4 bin1]

luxuriant (plant growth) / rich with fragrance / phenanthrene C14H10

poor / humble / unworthy / radish (old)

(name of states and dynasties at several different periods) / surname Qi

neat / even / level with / identical / simultaneous / all together / to even sth out

defensive line or perimeter / CL:道[dao4]

thread / string / wire / line / CL:條|条[tiao2],股[gu3],根[gen1] / (after a number) tier (unofficial ranking of a Chinese city)