On hearing the news, his joy was plain in his every word.
Tips
usage
Subject is always an emotion (喜悦, 悲伤, 思念, 感激). Literal: '(the feeling) overflows beyond the surface of the words' - the speaker tried to be measured but the emotion still leaks through.
register
Written/literary flavor. Essays, letters, formal reports. In spoken Chinese prefer 看得出来 or 一眼就能看出.