“变活跃”常见的英文表达有 become more active、get more active 或 turn more active 。例如：
Since he joined the sports club, he has become more active.（自从他加入体育俱乐部后，他变得活跃起来了。 ）
You should get more active to keep fit.（你应该更活跃些，以保持健康。 ）