authoritative

This textbook is considered the most authoritative guide on classical Roman architecture.

(Chinese) 这本教科书被认为是古罗马建筑方面最权威的指南。

The news agency issued an authoritative report dismissing the rumors of a stock market crash.

(Chinese) 新闻机构发布了一份权威报告，驳斥了股市崩盘的传闻。

He spoke in an authoritative tone that silenced the noisy room immediately.

(Chinese) 他用一种命令式的口吻说话，让喧闹的房间立刻安静了下来。

The captain's authoritative manner inspired confidence in his exhausted troops.

(Chinese) 上尉那威严的神态激励了精疲力竭的部队。