Unsafe problems的用法和樣例：
例句
- Radioactive and other hazardous materials present health and safety problems in increasing numbers of countries.
放射性及其它有害物質將給越來越多的國家帶來健康和安全問題。 - Meanwhile, we proposed some relevant theorems or regulations to solve the security problems of mutable attribute range.
同時提出相應的一些定理或規則，從而初步解決可變屬性的值域安全問題。
