formal

(Adj) 正式的
【例句】
A policy is a complex legal document stating in great detail and in formal language what the company will and will not do if the disaster occurs, and what the insured person should do in such circumstances.
一份保險單是一詳盡且用正式的語言陳述如果災難發生時，保險公司會與不會做的事項，及在此情況下，被保險人該做之事的複雜且合法的文件。