A matter of necessity的用法和样例：
- As a matter of fact, I've never been there before.
- That men would die was a matter of necessity; which men would die, though, was a matter of circumstance.
- 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.