重点讲解：
1. get attached to
非常喜欢…的，热爱…的；
eg. By themselves they are good experiences, but if you get attached to them, they become obstacles.
它们是很好的经验，但如果你执著于它，就会变成一种障碍dGU^~Eu~sy_mv。
eg. Various parts will have a cult food that people get enormously attached to.
很多地方都有这样让人十分着迷的食物UWPREjTpo2ll~ozWZM&z。
2. in return
回报；报答；
eg. He was always ready to help others, in return, he was liked by everyone.
他总是乐于助人，作为回报，大家都喜欢他rahql^&(UL;Ki。
eg. I'm just watching for a chance to punish him in return!
我正在伺机报复他呢！
3. a waste of
浪费；
eg. It's a waste of time and energy.
那是浪费时间和精力IO(V7_7KTf_p。
eg. A wrong approach means a waste of effort.
路子不对等于白费劲儿BIzO6Cdo]~)*5v5-DkBy。