I can make just such ones if I had tools, and I could make tools if I had tools to make them with.

I can make just such ones if I had tools, and I could make tools if I had tools to make them with.

如果我有工具，我就能做出这样的东西，如果我有工具，我也能做出工具。

-- Eli Whitney 伊莱·惠特尼