发明

Front view of a man in casual clothes covering ears with hands and looking at camera

Front view of a man in casual clothes covering ears with hands and looking at camera

Front view of a man in casual clothes covering eyes with hands

Front view of a man in casual clothes covering eyes with hands

Man standing in a room and shrugging his shoulders

Man standing in a room and shrugging his shoulders

Front view of a man with crossed fingers

Front view of a man with crossed fingers

Man in casual clothes standing

Man in casual clothes standing

Front view of a man with closed eyes standing with raised hands

Front view of a man with closed eyes standing with raised hands

Young asian man speaking into a microphone

Young asian man speaking into a microphone

An asian teacher in a checkered suit, a tie and a book in his hand, working with the class

An asian teacher in a checkered suit, a tie and a book in his hand, working with the class

Man in casual clothes standing

Man in casual clothes standing

Young man in orange sweatshirt standing

Young man in orange sweatshirt standing

Three-quarter view of a man in casual clothes listening attentively

Three-quarter view of a man in casual clothes listening attentively

Front view of an impressed man showing size of something

Front view of an impressed man showing size of something

A man in a white shirt and brown suspenders

A man in a white shirt and brown suspendersAI

Man in casual clothes standing

Man in casual clothes standing

Impressed man looking up

Impressed man looking up

Front view of an impressed man showing size of something

Front view of an impressed man showing size of something

Three-quarter view of a man in casual clothes covering eyes with hands

Three-quarter view of a man in casual clothes covering eyes with hands

Young asian man screaming in excitement

Young asian man screaming in excitement

Young asian man speaking into a microphone

Young asian man speaking into a microphone

Front view of a cheerful man in casual clothes showing thumbs up

Front view of a cheerful man in casual clothes showing thumbs up

Young asian man presenting a digital tablet

Young asian man presenting a digital tablet

Man in casual clothes standing

Man in casual clothes standing

Front view of a man with extended arm staring at someone

Front view of a man with extended arm staring at someone

Three-quarter view of a man in casual clothes saluting with hand

Three-quarter view of a man in casual clothes saluting with hand

Front view of a marching man

Front view of a marching man

Man in casual clothes posing

Man in casual clothes posing