Put some iron nails at the bottom of a test tube.

把一些铁钉放在试管的底部。

youdao

You're sitting at the bottom of the world with a head of iron.

你顶着一颗钢头坐于世界之顶。

youdao

You're sitting at the bottom of the world with a head of iron.

你顶着一颗钢头坐于世界之顶。

youdao