第二道彩虹将比第一道更大，并位于第一道的正上方。

The second rainbow will be bigger than the first, and directly above it.

《柯林斯英汉双解大词典》

享受一天中的第一个小时。这很重要，因为这第一个小时决定当天其余时间的情绪。

Enjoy the first hour of the day. This is important as it sets the mood for the rest of the day.

《柯林斯英汉双解大词典》

下一个句子开头的第一个单词的第一个字母要大写。

Then the next sentence starts with a capital letter of the first word of the sentence.

youdao

Now the first law is going to hold in all of these steps, and we're going around in a cycle.

现在热力学第一定律,就蕴含在这所有的步骤里了，我们沿着这个循环走。

麻省理工公开课 - 热力学与动力学课程节选

The first is the radical theology, and the second is this poem's equally radical and equally daring original verse form.

第一是它激进的神学观点，第二是这首诗,同样激进大胆的原始诗歌形式。

耶鲁公开课 - 弥尔顿课程节选

All right? The first one is, that test has to involve-- shouldn't have to, the value of some variable.

好不好？第一件事是，循环开始的测试必须必须-不是一定，一些变量的值。

麻省理工公开课 - 计算机科学及编程导论课程节选