Research Shows Dogs Really Do Understand Humans(翻译)

impress – v. to cause (someone) to feel admiration or interest

evolutionary – adj. the way things change due to a natural process over a long period of time

tone – n. a quality, feeling, or attitude expressed by the words that someone uses in speaking or writing

pitch – n. the highness or lowness of a sound

encouraging – adj. causing a hopeful feeling

tune in – v. to understand and be aware of a situation, other people's needs