全文 The whole conversation, with pinyin and English
志伟：美玲，你今天怎么只买一杯水？你不饿吗？
měi líng nǐ jīn tiān zěn me zhǐ mǎi yì bēi shuǐ nǐ bú è ma
Zhiwei, a classmate: Meiling, how come you only bought a cup of water today? Aren't you hungry?
美玲：我带了面包当早餐。我想把零用钱存起来，下个月给妈妈买生日礼物。
wǒ dài le miàn bāo dàng zǎo cān wǒ xiǎng bǎ líng yòng qián cún qǐ lai xià gè yuè gěi mā ma mǎi shēng rì lǐ wù
Meiling: I brought bread for breakfast. I want to save my pocket money to buy Mum a birthday present next month.
志伟：真好！可是我每天都把零用钱花在零食上，一块钱也存不了。
zhēn hǎo kě shì wǒ měi tiān dōu bǎ líng yòng qián huā zài líng shí shang yí kuài qián yě cún bu liǎo
Zhiwei, a classmate: That's great! But I spend all my pocket money on snacks every day. I can't save even a dollar.
美玲：如果你每天少买一包薯片，一个星期就能存五块钱。
rú guǒ nǐ měi tiān shǎo mǎi yì bāo shǔ piàn yí gè xīng qī jiù néng cún wǔ kuài qián
Meiling: If you buy one less packet of chips each day, you can save five dollars a week.
志伟：有道理！而且薯片太油了，吃多了对身体也不好。
yǒu dào lǐ ér qiě shǔ piàn tài yóu le chī duō le duì shēn tǐ yě bù hǎo
Zhiwei, a classmate: That makes sense! And chips are too oily. Eating a lot isn't good for you either.
美玲：对啊。我们可以买水果，又健康又便宜。
duì a wǒ men kě yǐ mǎi shuǐ guǒ yòu jiàn kāng yòu pián yi
Meiling: Right. We can buy fruit. It's healthy and cheap.
志伟：好，从明天开始，我也要存钱。积少成多嘛！
hǎo cóng míng tiān kāi shǐ wǒ yě yào cún qián jī shǎo chéng duō ma
Zhiwei, a classmate: OK, from tomorrow I'll save money too. Little amounts add up!
美玲：太好了！我们一起去买苹果吧。
tài hǎo le wǒ men yì qǐ qù mǎi píng guǒ ba
Meiling: Great! Let's go and buy apples together.