他用基数词来描述他的年龄。

He used cardinal numerals to describe his age.

基数词在日常生活中非常常见。

Cardinal numerals are very common in everyday life.

我们在数学课上学习了如何使用基数词。

We learned how to use cardinal numerals in math class.

基数词表示数量，比如一、二、三。

Cardinal numerals represent quantities, such as one, two, three.

对比基数词和序数词的不同.

Know the difference between ordinal numbers and cardinal numbers.

掌握基数词和序数词的用法.

Know how to distinguish and use ordinal numbers and cardinal numbers.

指出以下句子中划线（红色）部分的基数词的语法作用。

Decide the functions of the underlined cardinal numbers in the following sentences.

本文旨在讨论基数词和序数词的语序及其相关问题.

This thesis discusses word order concerning cardinals and ordinals and its relevant problems.