All notional words (nouns, verbs, adjectives, adverbs, etc. Capitalize the beginning, and capitalize function words (prepositional articles) with more than 4 letters (such as behind, under). In other words, function words with less than three letters (including three letters) are all lowercase. But the words at the beginning of the title should be capitalized no matter how many letters.

For example, a cake can be translated into a cake.

In addition, if the title begins with the definite article the, it will generally be omitted.