oral expression ability的用法和样例：
例句
- The comprehension of English tenses, their expression in particular, is a crucial factor to the elevation of oral expression ability.
摘要英语时态的理解，尤其是表达，是提高口语表达能力的一个关键要素。 - This article tells the detailed practice methods of the three expressive forms, which hopes to improve policemen's expressive ability of spoken language.
文章较为详细地介绍了以上三种主要口语表达方式的练习方法，旨在提高公安民警的口语表达能力。
