yī dìng
要按一定的程序进行操作。
Yào àn yīdìng de chéngxù jìnxíng cāozuò.
Operations must be carried out according to certain procedures.
文章的深浅跟篇幅的长短，并没有一定的关系。
Wénzhāng de shēnqiǎn gēn piānfú de chángduǎn, bìng méiyǒu yīdìng de guānxì.
The depth of an article does not necessarily have a relationship with its length.
一定要努力工作
Yīdìng yào nǔlì gōngzuò.
You must work hard.