All we need to do is to keep these pure and clean, and to use all we possibly can of them.

我们所要做的就是保持这种纯净和整洁，并尽我们最大的努力利好这些物质的可能性。

youdao

All we need to do is to keep these pure and clean, and to use all we possibly can of them.

我们所要做的就是保持这种纯净和整洁，并尽我们最大的努力利好这些物质的可能性。

youdao