dāng当yǔ宇háng航yuán员shū叔shū叔chuān穿shàng上hòu厚shí实、kù酷xuàn炫de的cāng舱wài外yǔ宇háng航fú服，xiǎo小xīn心yì翼yì翼dì地dǎ打kāi开tài太kōng空cāng舱dà大mén门mài迈xiàng向qī漆hēi黑de的yǔ宇zhòu宙shí时，zhè这xiàng项le了bù不qǐ起de的huó活dòng动jiù就jiào叫zuò做“tài太kōng空xíng行zǒu走”huò或“cāng舱wài外huó活dòng动”。yóu由yú于tài太kōng空zhōng中shì是lěng冷bīng冰bīng冰de的chāo超qiáng强zhēn真kōng空，gēn根běn本méi没yǒu有kōng空qì气lái来chuán传bō播shēng声yīn音，suǒ所yǐ以yǔ宇háng航yuán员shū叔shū叔zài在wài外miàn面nǎ哪pà怕dà大hǎn喊dà大jiào叫，tóng同bàn伴yě也shì是tīng听bù不jiàn见de的，tā他men们bì必xū须yī依kào靠yǔ宇háng航fú服lǐ里gāo高kē科jì技de的wú无xiàn线diàn电duì对jiǎng讲jī机jìn进xíng行kuài快lè乐de的tōng通huà话。yǔ宇háng航fú服lǐ里miàn面zì自dài带chōng充zú足de的yǎng氧qì气、tián甜tián甜de的shuǐ水hé和gāo高jí级de的diào调wēn温xì系tǒng统，jiù就xiàng像yī一gè个xiǎo小xiǎo小de的dú独lì立fēi飞chuán船yī一yàng样bǎo保hù护zhe着shēn身tǐ体。tài太kōng空xíng行zǒu走shì是yī一xiàng项fēi非cháng常zhòng重yào要de的rèn任wù务，yǔ宇háng航yuán员xū需yào要qù去xiū修lǐ理wài外miàn面de的wèi卫xīng星、ān安zhuāng装gāo高kē科jì技shí实yàn验shè设bèi备，hái还néng能zhàn站zài在yǔ宇zhòu宙zhōng中，yī一tái抬tóu头jiù就xīn欣shǎng赏dào到wán完quán全méi没yǒu有dà大qì气céng层zhē遮dǎng挡、liàng亮jīng晶jīng晶、chāo超jí级chún纯jìng净de的mǎn满tiān天fán繁xīng星ne呢！

When an astronaut puts on a thick, cool extravehicular spacesuit and carefully opens the cabin door to step into the dark universe, this amazing activity is called a 'spacewalk' or 'extravehicular activity.' Because space is a freezing, intense vacuum with absolutely no air to carry sound waves, astronauts can't hear each other even if they shout at the top of their lungs outside; they must rely on high-tech radios built into their suits to talk happily. The spacesuit comes with its own supply of oxygen, sweet water, and an advanced climate system, protecting the body just like a tiny independent spaceship. Doing a spacewalk is a very important task—astronauts need to repair exterior satellites, install high-tech lab gear, and stand out in the universe, looking up to enjoy brilliant, crystal-clear stars completely unblocked by an atmosphere!

👧 Compare With You

你抬头看天空的方式，和今天学的太空知识有什么联系？ How does looking at the sky connect to today's space fact?

📚 Vocabulary

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🎯 Fun Challenge

太空中是超强真空，没有空气传播声音，宇航员在太空行走时靠什么和同伴通话？

Since space is an airless vacuum with no sound, what do astronauts use to talk to each other during a spacewalk?

💡 想一想刚才读到的内容。 Think about what you just read.