All languages have two general levels of usage—a formal level and an informal level.

所有语言都有两种基本的用法——正式用法和通俗用法。

youdao

This separation must not be just on a formal level.

分离不能只是在正式水平上。

youdao

During the requirements phase of a project, analysts can take use cases to the next level by providing a more formal level of refinement.

在项目的需求阶段，分析师能通过提供一个更加正式层次的表达，把用例带入下一层次。

youdao

Participants who pass this test are awarded high school graduation certificates by the Department of Education, which enable them to continue to higher education or seek formal employment at a similar level to formal school graduates.

UNESCO: Country Profile: Philippines

While some people might not immediately associate blue-collar occupations with higher-level formal education, some of these managers and supervisors must have extensive knowledge of business or sciences to perform the tasks of, for example, power plant operator or agricultural manager.

FORBES: America's Best-Paying Blue-Collar Jobs

Gibbs has gotten used to very high-level, very formal communication.

FORBES: Will Robert Gibbs Find a Friend in Facebook?