unmistakably

The footprints left in the soft mud were unmistakably those of a large brown bear.

(Chinese) 留在软泥里的脚印显而易见是大棕熊留下的。

Although he tried to hide his sadness, the look in his eyes was unmistakably grief-stricken.

(Chinese) 虽然他试图掩饰悲伤，但他眼神中的样子显而易见是极其悲痛的。