A matter of necessity的用法和样例：
- It is more a matter of necessity.
- As a matter of fact, I've never been there before.
- The balance between pagination and scrolling is partly a matter of taste and partly a matter of necessity.
- It is a matter of life and death for them.
- As a matter of necessity, cases of neglect taken on by the DSS in most states are ones that are incredibly dire.