1.Parents should not be too strict with teenagers.父母不应该对青少年要求太严格。（1）be strict with sb.对某人要求严格；be strict in /about sth.对某事要求严格
2.But sometimes these can get in the way of their schoolwork, and parents might worry about their success at school.但是有时候这些爱好会妨碍他们的学业，父母可能担心他们在学业上的成功。（1）get in the way of...挡......的路；妨碍（2）worry about担心；担忧（3）at school 在学校
3.He is on his school team and has always wanted to be a professional runner when he grows up.他是学校校队的队员，一直想长大后成为一名职业跑步运动员。（1）on one’s school team 在校队（校队队员）（2）always 一直；总是，用于现在完成时态中，带有强烈的感情色彩，表示“一直以来......”。（3）grow up长大
4.However，his parents won’t allow him to train so much.然而，他的父母不允许他过多地训练。（1）allow sb.to do sth.允许某人做某事（2）train so much 过多地训练
5.My wife and I have supported every one of his races.我和我的妻子支持他的每一次比赛。（1）support支持，动词。support sb.in(doing) sth.在（做）某事上支持某人
6.We have nothing against running!我们不反对跑步！（1）have nothing against (doing)sth.不反对（做）某事
7....so he needs to think about what will happen if he doesn’t end up as a professional runner.所以他需要考虑如果最终成不了职业跑步运动员将会发生什么。（1）think about考虑（2）end up结束（3）happen发生，动词。Sth.happened +地点/时间，意思是“某地/某时发生了某事”。Sth. Happened to sb.某人出了某事（常指不好的事）。（4）happen碰巧；恰好，系动词。Sb.happened to do sth.某人碰巧做了某事。It happened that 从句...，意思是“碰巧......”。
8.My parents have always taught me how important it is to work hard at school and enter university.我的父母一直教导我在学校努力学习和考上大学是多么重要。（1）work hard at school 在学校努力学习（2）enter university 考上大学
9.I understand this, but I’m serious about running.对此我理解，但对于跑步我是认真的。（1）be serious about...认真对待......，相当于take...seriously。
10.His parents believe that Liu Yu should study hard in the evenings so they don’t allow him to practice running at night.他的父母认为刘宇应该在晚上努力学习，因此他们不允许他在晚上练习跑步。（1）study hard努力学习（2）in the evenings在晚上（3）practice doing sth.练习做某事（4）at night在晚上
11.I know my parents care about me.我知道我的父母关心我。（1）care about关心
12.I think I should be allowed to make this choice myself.我认为应该允许我自己做这个选择。（1）make a choice做一个选择
13.Only then will I have a chance to achieve my dream.只有到那时我才会有机会实现我的梦想。（1）have a chance to do sth.有机会做某事（2）achieve one’s dream(s)实现某人的梦想（3）该句是一个倒装句，正常语序是“I will have a chance to achieve my dream only then.”当only 位于句首，其后接副词、介词短语或状语从句是， 句子或主句要用部分倒装结构，即把助动词、情态动词、连系动词be放在主语前。如果only后面跟的是主语，则不用倒装。如，Only in this way can you learn English well./Only three people were hurt in the car accident.