They are doing some pattern practice.

他们在做句型练习。

youdao

Once you've mastered a pattern, practice substituting different words in the pattern to create new sentences.

一旦你掌握了这些句型，练习在这些句型中转换不同的词语来造新的句子。

youdao

Once you've mastered a pattern, practice substituting different words in the pattern to create new sentences. Each pattern is a template for your selfexpression.

一旦你掌握了这些句型，练习在这些句型中转换不同的词语来造新的句子。每个句型 都是你专属的表达模板。

youdao

It's really a good pattern that you should practice and use often.

这是个非常棒的句型，你应该多多练习哦！

Would you please 课堂 - SpeakingMax英语口语达人

Practice the "who" pattern.

多加练习这个句型。

Who 课堂 - SpeakingMax英语口语达人

Our pattern or practice investigation of the New Orleans Police Department (NOPD) marked the first time ever that the Justice Department found reasonable cause to believe that a police department had engaged in a pattern or practice of gender-biased policing.

WHITEHOUSE: Council on Women and Girls Blog

"There is a regular pattern and practice of not producing memos, minutes, reports, and e-mails, " Biller said.

CNN: STORY HIGHLIGHTS

"They failed to show a single constitutional violation much less a widespread pattern or practice, " Ms. Grossman said.

WSJ: Judicial Fixes Are Debated As Police-Stops Trial Ends