This is really a seat with an extra wheel.

这真的是一个额外加了一个轮子的座位。

The newer A320s flying for Air India do not have extra wheels.

为印度航空公司飞行的较新的 A320 没有额外的轮子。

Do most A320s need extra wheels?

大多数 A320 都需要额外的轮子吗？

Indeed, finding an Air India A320 (or any A320, really) with extra wheels can be a little treat for avgeeks.

事实上，找到一架带有额外轮子的印度航空 A320（或任何 A320，真的）对 avgeeks 来说是一种享受。

For example, in your car you often have an extra wheel, which we would call a " spare tire" or simply, as a noun, a " spare."

例如，在您的汽车中， 您通常有一个额外的轮子，我们称之为“备用轮胎” 或简称为“备用” 。