Cole's dream is to sail around the world.

Cole 的夢想是搭船環遊世界。

Your sentence is correct, but we wouldn't say it that way.

你的句子是正確的，但是我們不會那樣說。

Dolphins are smart, playful, and friendly to humans.

海豚聰明又活潑，而且對人類很友善。

How much extra did you pay for the service?

你付了多少錢加購那項服務？

Melissa lived abroad for a few years.

Melissa 在國外住過幾年。

Larry loves showing off his fancy new car.

Larry 很喜歡炫耀他的高檔新車。

All of our courses are three months long.

我們所有的課程皆為期三個月。

You won't improve if you only focus on vocabulary.

你如果只注重字彙是不會進步的。