In talk about atoms, fissile means this kind of material can be split in nuclear fission — the splitting of the centre of an atom. Uranium-235 and plutonium-239 are the famous fissile stuff used in power stations and, sadly, in bombs.

In talk about atoms在講到原子的時候 fissile means的意思是 this kind of material這種材料 in nuclear fission在核分裂中 can be split可以被分裂 — the splitting of the centre of an atom也就是原子核心的分裂。Uranium-235 and plutonium-239鈾-235和鈽-239 are是 the famous fissile stuff知名的可裂變材料 used in power stations用在發電廠 and, sadly, in bombs也很遺憾地用在炸彈裡。

Though actually, careful nuclear scientists draw a thin line: fissile often means it can split after catching a slow neutron; fissionable is a wider word that also covers things that need a fast neutron. In everyday English, people blur the two.

Though actually不過 careful nuclear scientists講究的核子科學家 draw a thin line會畫一條細線: fissile often means通常是指 after catching a slow neutron在捕捉到一個慢中子之後 it can split可以分裂; fissionable is a wider word則是更廣的詞 that also covers也包括 things that need a fast neutron需要快中子的東西。In everyday English在日常英文裡 people人們 blur the two會把這兩個字混在一起。

There is an older, quieter sense in geology: a fissile rock, like shale, splits easily into thin sheets. Same idea — able to be split — different world.

in geology在地質學裡 There is還有 an older, quieter sense一個比較舊、比較少人提起的意思: a fissile rock, like shale像頁岩這樣的岩石 splits easily into thin sheets很容易裂成一片一片薄薄的。Same idea同樣的概念 — able to be split可以被分裂 — different world卻是不同的領域。

The word is a science adjective, not a thing you hold.

The word這個字 is a science adjective是科學形容詞 not不是 a thing you hold你能拿在手上的東西。