to play or move actively, especially as a child
玩耍或活跃地移动，尤其是作为孩子时
"We used to run around the fields all day long."
"我们小时候整天在田野里跑来跑去。"
to count backward to mark the start of an event
to encourage people to buy more goods or services
to publicly support a cause or person
to suddenly start laughing
to gradually become more emotionally connected
to register or enroll in a course or activity
