A neutrino is one of the smallest particles we know of — far smaller than an atom, with no electrical charge and almost no mass. What makes it famous is that it hardly touches anything.

A neutrino微中子 is one of the smallest particles we know of是我們已知最小的粒子之一 — far smaller than an atom比原子還要小得多, with no electrical charge and almost no mass沒有電荷，質量也幾乎是零。What makes it famous讓它出名的原因 is that it hardly touches anything是它幾乎不跟任何東西起作用。

Neutrinos pour out of the sun in unimaginable numbers and pass straight through the earth, through buildings, through your body, day and night, without you feeling a thing; roughly a hundred trillion go through you every second. Because they pass through everything, they are extremely hard to catch.

Neutrinos微中子 pour out of the sun in unimaginable numbers從太陽噴發出來的數量多到難以想像 and pass straight through the earth, through buildings, through your body而且會直接穿過地球、穿過建築物、穿過你的身體, day and night不分晝夜, without you feeling a thing你完全感覺不到; roughly a hundred trillion go through you every second大概每秒鐘就有一百兆個穿過你的身體。Because they pass through everything因為它們會穿過所有東西, they are extremely hard to catch所以要抓到它們非常困難。

Physicists build enormous detectors — tanks of water or ice, buried deep underground or sunk into the Antarctic — and wait, sometimes for months, for a handful of neutrinos to happen to hit something.

Physicists build enormous detectors物理學家建造巨大的偵測器 — tanks of water or ice, buried deep underground or sunk into the Antarctic裝滿水或冰的水槽，深埋在地底下或沉在南極 — and wait, sometimes for months然後等待，有時候要等上好幾個月, for a handful of neutrinos to happen to hit something才等到幾個微中子剛好撞上什麼東西。

Two more things worth knowing. Neutrinos come in three types (physicists say "flavours") and, surprisingly, change from one type into another as they travel — a discovery that won a Nobel Prize in 2015 and proved they have some mass after all, which the original theory said they should not. And because they escape from places light cannot leave, such as the middle of an exploding star, they let us see events we could never otherwise watch.

Two more things worth knowing還有兩件值得知道的事。Neutrinos come in three types微中子有三種類型 (physicists say "flavours")（物理學家稱之為「flavours」，口味） and, surprisingly, change from one type into another as they travel而且很讓人意外的是，它們在飛行過程中會從一種類型變成另一種 — a discovery that won a Nobel Prize in 2015這個發現讓人在2015年拿到諾貝爾獎 and proved they have some mass after all也證明了它們其實是有一點質量的, which the original theory said they should not而原本的理論說它們不應該有質量。And because they escape from places light cannot leave而且因為它們能從光都逃不出來的地方跑出來, such as the middle of an exploding star像是爆炸恆星的中心, they let us see events we could never otherwise watch這讓我們能看見原本絕對看不到的事件。

The plural is neutrinos. This is a physics word, but it appears often in popular science writing and news, and among students of science it is used with a certain affection.

The plural is neutrinos複數形是neutrinos。This is a physics word這是一個物理學的字, but it appears often in popular science writing and news不過它常常出現在科普文章和新聞裡, and among students of science而在理科學生之間 it is used with a certain affection大家用起這個字帶著一種特別的喜愛感。