The scientist is engaged in serious research to uncover the very nature of the physical world.

这位科学家正在进行认真的研究，以揭示物理世界的本质。

Some psychologists suggest that young children learn about more than just the physical world in this way.

一些心理学家建议，小孩子通过这种方式学习的不仅仅是物质世界。

We've talked about the physical world.

我们已经讨论过了物质世界

As in the physical world, so in the economic one.

与物理世界一样，经济世界也是如此。

The physical world intrudes in all sorts of messy ways.

物理世界有各种各样的麻烦。