Most of us write with ballpoint pens.

我们多数人用圆珠笔写字。

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Because although only the space pen writes upside down, ballpoint pens do work in space.

因为虽然只有太空笔能倒过来写字，普通圆珠笔其实能在太空中也能用。

youdao

Because although only the space pen writes upside down, ballpoint pens do work in space.

因为虽然只有太空笔能倒过来写字，普通圆珠笔其实能在太空中也能用。

youdao