Its size is 2080mm in length, 1060mm in width, and 1635mm in height.

Although without the comma after 'width' it sounds fine, adding the comma is correct since you are listing aspects about the trike.

It has three seats: a driver's seat and two passenger seats.

By describing the amount of each type of seat, you can easily make this sentence flow better when reading it. It may be a little nit picky but I think it's optimal :)

It is a battery-powered trike with a 650 - -watt electromotor.

If you look up descriptions for wattage amounts in products, the number and 'watt' will usually be put together. Also not sure if you meant electric motor?

There are two doors respectively on the left and right respectively and a small skylight on its roof.

I wanted to honor your choice of using the word 'respectively' since it works well with this sentence by moving it to the correct spot. Since respectively is used when you want to say something is in a specific order, you say it after the specifics. Good job!

DWell during the winter, the weather in my place iscan get very cold -; the temperature can even be negative.

Since you asked a question in the previous sentence, adding 'well' to answer the sentence is the best option for your sentence to flow with your paragraph.
(I'm not very sure on semi colons, so don't take my advice *too* seriously.)
"the temperature can be negative." can be joined with the beginning of the sentence since they are both related to the same topic.

If I ride an electric bike to work, the cold air makes my face ache, my nose run, and me cough.

If I drive amy car to work, it i's difficult to find a free parking space.

Using "a car" makes it sound sort of vague on who owns the car. If it's your car then you would say "my" to state that it belongs to you.

I might be overcorrecting, but using "it's" instead is good for fluency in writing, but "it is" is still correct.

And you know, driving a car means a lot of trouble,. Things such as getting traffic tickets, finding free parking spaces, and adding gasoline.

I think separating this sentence into two prevents it from being a run-on sentence. Using "such as" was a good choice!

Thise trike won’t get a traffic ticket as there aren't strict rules for trikes in my city.

Using "this" works too, but using "the" can work better, given that you have context that this is your trike and not someone else's. As an example, "This car is really nice," and "The car is really nice," can sound different because of context. Using 'this' implies that it isn't owned by you, or isn't yours to keep. When using 'the' here, it can sound like you just bought the car. Generally 'the' is better to use if it is yours, and 'this' when you are referring to something that is not necessarily yours.

It’s also very convenient to drive because it is small and flexible.

Using the same word to start your sentence twice can make the sentences seem awkward next to each other.

It alsoAnother benefit is that it saves money.

When listing things in separate sentences like this, its important to use different vocabulary that essentially mean the same thing. This is mostly for fluency reasons in your text. You could also combine this sentence and the previous one so that you aren't using similar words to begin many sentences in a row.

Before I bought it, I often stayed at home on weekends, but a. After I bought it, I ride it around my city every weekend.

Try to avoid using too many commas in a sentence. A good amount to settle on is around 1-2 when you aren't listing amounts of something. Ex: I went to the store to buy eggs, bread, milk, and cheese.

Today is the weekend again and I aso I'm going to ride around with my wife.

"I am" is technically correct, but it's more common to just combine the two into "I'm" for fluency reasons. Using "so" instead of "and" gives you more context as to why you are going to ride around with your wife, since before you mentioned you stayed home on weekends.

Well, that’s all for this journal, and I will see you soon with the next one.

Commas are difficult for even natives to figure out where to place them sometimes so I understand!

During winter, the weather in my placwhere I live is very cold - the temperature can beis sometimes negative.

Sounds more natural - it is not really common to refer to where you live as "my place"

If I ride an electric bike to work, the cold air makes my face ache, my nose run and meI start to cough.

"Me cough" is not grammatically correct here - but would be if you were to move it to the start of the sentence: "The cold air makes me cough, my face ache, and my nose run"