头头是道

clear and logical

头的英语翻译：

beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【医】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-

是的英语翻译：

am; are; be; been; being; correct; is; right; that; this; yes

道的英语翻译：

path; road; doctrine; Tao; say; talk; way; method
【医】 canal; canales; canalis; meatus; passage; path; pathway; tract; tractus
viae