you bet idiom informal
（表示强调）当然
used to emphasize a statement or to mean "certainly"
"Are you coming to the party?" "You bet!" “你来参加晚会吗？”“当然喽！”
US（回应对方的感谢时）不用谢
used when someone thanks you
"Thanks for your help." "You bet. Anytime." “谢谢你的帮助。”“当然，有事尽管开口。”