我们在非洲草原上看到了一群野牛在喝水。

We spotted a group of ___buffalo drinking water on the African savanna.

草原上可以看到成群的北美野牛在吃草。

Herds of ___buffalo can be seen grazing on the prairie.

这些复杂的数学题把我完全搞糊涂了。

These complicated math problems totally ___buffalo me.