note: review the chapter three

part one vacabularies

1, haggard /ˈhæɡəd/ （尤指因病或睡眠不足）憔悴的，形容枯槁的，困倦的 Someone who looks haggard has a tired expression and shadows under their eyes, especially because they are ill or have not had enough sleep.

raw: It's a familiar sight on college campuses across the country: Haggard-looking students slump over library desks and laptops.

2, slump /ˈslʌmp/ (因疲劳、生病等而重重)倒下，跌倒 If you slump somewhere, you fall or sit down there heavily, for example because you are very tired or you feel ill.

s: I saw the driver slumped over the wheel.

3, zombie /ˈzɑːmbi/ 可数名词  麻木迟钝的人;毫无生气的人;无精打采的人 You can describe someone as a zombie if their face or behaviour shows no feeling, understanding, or interest in what is going on around them.

raw: Zombie-like, they lurch across campus in search of caffeine and sugar.

4, lurch /ˈlɚʧ/ VERB 动词（在不同的行动、态度之间）左冲右撞，摇摆不定 If you say that a person or organization lurches from one thing to another, you mean they move suddenly from one course of action or attitude to another in an uncontrolled way.

5, heroic /hıˈrowık/ ADJ-GRADED 矢志不渝的;艰苦卓绝的 If you describe an action or event as heroic, you admire it because it involves great effort or determination to succeed.

raw: However, studies show that these heroic efforts come at a cost (beyond the nightly pizza deliveries and pricey espresso(浓咖啡) drinks).

part two sentences

1, Dear God, they even stop flossing. 我喜欢这句：天哪，都不洗牙了！

2, Commit to doing something every day (not something you already do) just for the practice of building a habit and not making excuses. It could be calling your mother, meditating for five minutes, or finding one thing in your house that needs to be thrown out or recycled.我喜欢这个建议~

part three summary

Willpower can be used up. I need it to get up early and go Lab on time. I also need it to remind me that snackes are not healthy and I should have meals at cateen of school. Most importantly, I need it to keep me focused on my researches at worktime. But, the good news is that we can exercise it each day like a muscle to build strength for all our willpower challenges. Just pick one willpower challenge and exercise it as much as you can.