如何用get in the way of;(be) serious about;spend time on造句

playing can often get in the way of learning.
玩耍往往可以是学习的障碍
let's be serious about this.This is not a joke.
我们要对这认真一点,这可不是一个玩笑
We need to spend time on our practice,or we're going to lose the game.
我们需要花时间练习,否则我们会输掉这场比赛.
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