严格来讲

strictly speaking

surname Yan

tight (closely sealed) / stern / strict / rigorous / severe / father

strict / stringent / tight / rigorous

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 come / to arrive / to come round / ever since / next

as to / considering / for

to speak / to explain / to negotiate / to emphasize / to be particular about / as far as sth is concerned / speech / lecture