Either he could not come or he did not want to.

他要么是不能来要么就是不想来。

《牛津词典》

Either he went through with this thing or he did not; it was all or nothing.

他要么把这件事做完，要么就不做，只有这两种选择。

《柯林斯英汉双解大词典》

Either he is guilty, or not guilty.

一个人不是有罪，就是清白的。

youdao

If a drafted man could not do either thing, then he must join the army or be shot as a deserter.

VOA: special.2009.10.29

A supplement, he points out, is something that either completes something that isn't complete or adds to something that already is complete.

他指出，一个补充物，或者是补充了不完整的事物,或者补充了已经完整的事物。

耶鲁公开课 - 文学理论导论课程节选

You know what I mean?" He was slouched rhetorically forward toward Franny, his receptive audience, a supporting forearm on either side of his martini.

你们知道我意思吗，他夸张的无精打采地,向弗兰尼走去，弗兰尼是他的忠实观众，他双臂撑在马提尼的两边。

耶鲁公开课 - 1945年后的美国小说课程节选

Either he is a self-aware man with a dose of humility or a shrewd manipulator of his audience.

CNN: Would a President Petraeus be in the cards?

The Israeli prime minister may have to resign if either he or one of his sons is charged.

ECONOMIST: Call this a ceasefire?

He had said either he or former Iranian Prime Minister Mir Hossein Mousavi would run as the reformist candidate in June.

CNN: Top Iranian reformer to challenge Ahmadinejad, reports say