" First of all" make sense, right? Logical.

“首先”有道理，对吧？合乎逻辑。

The rich man has cars of all makes.

那个富翁有各种各样牌子的小车。

And when you're in it, it sort of all makes sense.

当你置身其中 好像一切都顺理成章。

First of all, make sure you carry adequate water.

首先，确保你携带足够的水。

So, first of all, make sure you check the spelling.

因此，首先，请确保检查拼写。

So, first of all, make sure to use the modal verb as is.

因此，首先，请确保按原样使用情态动词。

We want to, first of all, make sure we have a way of finding out how much fish is in the ocean.

我们首先要确保有办法知道海洋里有多少鱼。

D stands for danger. We should first of all make sure that the accident scene is no longer dangerous.

D代表危险。我们首先要确定事故现场已经不危险了。

First of all, make sure those are closed, obviously, and then see if you can seal up the cracks at all.

首先，显然要确保它们已关闭，然后看看是否可以完全密封裂缝。

It's something new or you don't really know what it is, first of all, make sure you know how to spell the word.

这是新事物， 或者你真的不知道它是什么，首先，确保你知道如何拼写这个词。

And so, what the smartest thing to do is, first of all, make an appointment to ask for a raise, even if your expectation isn't that you're gonna get it.

那么，最明智的做法是什么，首先，你得要有要求加薪的实际行动，哪怕觉得这事可能不会成功。

Margaret saw, in her father's nervous ways, that the first impression of possible danger was made upon his mind, in spite of all his making light of what she told him.

玛格丽特从她父亲紧张的表情中看出，尽管他对她告诉他的一切都轻描淡写，但可能的危险的第一印象已经出现在他的脑海中。