A unity invariably tends to break up into different parts.

统一体总要分解为不同部分的。

Sentences break up into clauses.

句子可分成若干子句子。

Once a week you will break up into discussion sections.

每周有一次你们都将被分成讨论小组。

I suggest to break up into groups and discuss the ideas.

我建议分成几组讨论这些想法。

Sentences break up into clauses and clauses into phrases.

句子可以分成子句，子句可以分成短语。