音がする　^{yuigot　長谷川白紙}
the sound plays

ほらみて　いま
hey, look

くうきのさきが　ほら　すこしあつくて
the way the air¹ is headed, look, it's a little hot

それでぼくらは　きづく
so we realise²

でんき　や　じき
electricity, magnetism

あせがふるえる　みたい
sweat seems to tremble

よかん　と　しらべ
hunches and investigations

わきでて　しびれたあとに
after i have welled up and gone numb^x

ぼくの　おぼえている　おとがする
the sound i remember plays

ぜんぶが　いまどろどろとけて　ほら
everything becomes muddy³, look

わからなくなって
and i grow confused

それでもなんて
but even then

いとしいものだろう
they're things you hold dear

ぼくはしってる　これこそが
i know this well

なにもかも　おいてけぼりにして　いま　このよでいちばんたのしいこと
leaving everything behind is the most fun thing in this world

ぼくは　おぼえてるよ
i remember

みてたから
because i was looking

きいてたから
because i was listening

きっと　きみの　ために　ぼくがきた！
i'm sure i came for you!

僕と　この世　の間に！
⁴the space between me and this world!

全てを巻き込んで　音がする
i roll it all up in there, and the sound plays

それで僕らは気づく
so we realise²

汗が震えるみたい
sweat seems to tremble

僕とこの世の間に
the space between me and this world

全てを巻き込んで
i roll it all up in there

僕の覚えている音がする
and the sound i remember plays

^x indicates that i am unsure about a given line.
¹ the word くうき means air, but it also means mood or situation. くうきのさき should probably be interpreted as the way things are headed.
² the word きづく means to realise, but it also means to come to one's senses.
³ i abridged this line a little. どろどろ is a memetic word formed from the reduplication of 泥 (mud), and とける can mean to melt.
⁴ note that at this point the lyrics change from being written only with kana to incorporating kanji as well.