I didn't realize that emery boards and nail clippers were so valuable.

我不知道指甲锉指甲刀有这么值钱。

All of complex life is in one hand, and in a single stroke with a medium-grained nail file you could eradicate human history.

全部复杂生命都在一手里，“你起一把中度粒面的指甲锉，一下子就可以锉掉人类历史”。

After that, I'll need my nail clippers, nail file, and tweezers to do my nails and my plucking.

娜：在那之后，我需我的指甲剪、指甲锉镊子来修指甲。

I left out my elephant mug and my lady-curve nail file. They better not have stolen them!

我忘了我的大象杯我的女士曲线指甲锉。他们最好不偷走它们！

He sat down on a step, produced a long file from somewhere, and began to file his fingernails.

他在台阶上坐下， 从某处出一把长锉， 开始锉指甲。

Usually I'll do this after I file and buff my nails, but I just sometimes use this randomly 'cause it's so nice, this stuff.

通常我会在锉完指甲并擦亮指甲后这样做，但有时我会随机使用它， 因为它太棒了， 这东西。

A " nail file" (file) is a small tool, usually a flat little stick that is rubbed against the nails in order to make them smooth after you cut them, I guess.

“指甲锉” （锉刀）是一种小工具，通常是一根扁平的小棍子， 用来在指甲上摩擦， 以便在你剪指甲后使它们光滑， 我猜。