Either he's too fast, or I'm too slow.

要么他太快 要么我太慢

Either or both access modes may be set.

可以单独或者同时设置两个访问模式。

This has got to be either or doesn't it?

这必须或者是吗？

Either or both feel dissatisfied or resentful.

他们中有一方或者双方都感到失望和忿恨。

Okay that's a straightforward either or. Isn't it?

好，这是很直接的二选一，对吗？

It must also specify the build tool to be used, either or.

项目还必须指定要使用的构建工具，或者是或者是。