The octopus has a doughnut shaped brain.

章鱼有一个甜甜圈形状的大脑。

But the fuel, type of hydrogen gas, sits in that doughnut shape.

但是燃料，一种氢气，呈甜甜圈形状。

They've got a head in the middle of their body. They've got a doughnut shaped brain.

他们的身体中间有一个头。 他们有一个甜甜圈形状的大脑。

Shaping the dough into a doughnut shape helps you to get an even rope out of the dough so later when you portion it you can get a nice, even smaller portions out of it, as well.

把面团揉成甜甜圈的形状可以帮你得到一个均匀的条状面团，这样在分面团的时候得到的面团也会更小、更好看。