全文 The whole conversation, with pinyin and English
爸爸：宇航，你的指甲太长了。
yǔ háng nǐ de zhǐ jia tài cháng le
Dad: Yuhang, your fingernails are too long.
宇航：爸爸，剪指甲会痛吗？
bà ba jiǎn zhǐ jia huì tòng ma
Yuhang: Dad, does cutting nails hurt?
爸爸：不会痛。我用指甲刀慢慢剪。
bú huì tòng wǒ yòng zhǐ jia dāo màn màn jiǎn
Dad: It won't hurt. I'll cut slowly with the nail clippers.
宇航：为什么要剪指甲呢？
wèi shén me yào jiǎn zhǐ jia ne
Yuhang: Why do we need to cut our nails?
爸爸：指甲太长，里面会有细菌。
zhǐ jia tài cháng lǐ miàn huì yǒu xì jūn
Dad: When nails are too long, germs get underneath.
宇航：长指甲还会抓伤人！
cháng zhǐ jia hái huì zhuā shāng rén
Yuhang: And long nails can scratch people!
爸爸：对！坐好，不要动。这只手剪好了。
duì zuò hǎo bú yào dòng zhè zhī shǒu jiǎn hǎo le
Dad: Right! Sit still, don't move. This hand is done.
宇航：真的不痛！换这只手。
zhēn de bú tòng huàn zhè zhī shǒu
Yuhang: It really doesn't hurt! Now this hand.
爸爸：全部剪好了。去用肥皂洗手吧。
quán bù jiǎn hǎo le qù yòng féi zào xǐ shǒu ba
Dad: All done. Go and wash your hands with soap.
宇航：洗好了！我的手干干净净的。
xǐ hǎo le wǒ de shǒu gān gān jìng jìng de
Yuhang: Done! My hands are nice and clean.