We can test this by presenting them with rods that have black-and-white stripes.

我们可以用它们趋向黑白条纹的柱子来测试这个。

youdao

We can test this by presenting them with rods that have black-and-white stripes.

我们可以用它们趋向黑白条纹的柱子来测试这个。

youdao