Well, I think the main difference between like and as is in formality.

嗯，我觉这两个单词之间最主要差别要看它们正式性。

No formality. Just send me something in the mail.

别光说，记给我寄。

The recruitment officer had said that the medical examination was a " mere formality."

征兵办长官认为体检只是“走个过场”。

Wanna give us your money now? We can skip the formality of really playing.

现在可以交出钱来吗? 如此我们就不必正式玩了。

Actually, there are more than three levels of formality.

事实上，正式程度不止有三个层次。

Mr. Kelada, doubtless to set me at my ease, used no such formality.

Kelada 先生，无是为了让我放心，没有使用这种形式。

She didn't like the formality of the party.

她不喜欢宴拘泥礼节。

You can separate them for the level of formality.

你可以根据正式程度把它们分开。

So formality really is all about context.

所以说，正式与否完全取决于语境。

And finally, you want to mimic the formality of your date.

最后，你要模正式形式。

And maybe it's 'cause, in my opinion, I think a lot of Asian languages, and I'm thinking like Chinese maybe, there's more expressions of formality around etiquette and behavior than in English.

也许是因为，在我看来，我认为很多亚洲语言，我想像中国人一样，礼仪和行为正式表达可能比英语多。

It's really up to you, the formality of your speech and how you're feeling.

这完全取决于你，取决于你所说话正式程度和你喜好。

But they do have slight differences in tone and formality.

但他们在语气和礼节上确实略有不同。

And please, feel free to call me Rex. I'm not big on formalities.

叫我勒克斯就可以了，我不喜欢拘泥于礼节。

We use certain phrases and grammatical structures to show formality.

我们使用特定短语和语法结构来表示正式。

Getting humans to trust machines is not a formality.

让人们信任机器并不是一种形式。

Russia says it can start delivering gas once the " remaining formalities" are completed.

俄罗斯表示，一旦“剩余手续”完成，它就可以开始输送天然气。

These three sentences show three levels of formality.

这三个句子表现了正式程度三个层次。

But let's put aside engineering formalities, features of the human body, and some laws of physics and just try to get closer to the dream.

但让我们先把工程程序、人体特征和一些物理定律放在一边，试着离梦想更近一些。

You pirates are used to taking what you want without the formality of purchase.

你们这些海盗习惯于不经过购买手续就拿走你们想要东西。