A four-syllable word with first syllable stress with that AA vowel there: caa- caa- cate- cate- categories. Categories.

一个四音节词，第一个音节重音 AA 元音：caa- caa- cat- cat- categories。

You noticed I said: " category" , because I have four cate-...four, four categories on the board, here.

“类”，因为我有四个… … 黑板上列举了四类。

A four syllable word with first syllable stress with  that AA vowel there: caa-- caa-- cate-- cate-- categories. Categories. It's a noun, groups of  people or things that are similar in some way.

一个四音节词， 第一个音节重音带有 AA 元音：caa-- caa-- cate-- cate-- categories。类别。 它一个名词， 在某程度上相似一群人或事物。