protection level的用法和样例：
例句
- Adsorbate bacterins can vary in potency , which affects the level and duration of protection.
吸附菌苗在影响保护水平和时间的能力上可能不同。 - It has further completed the procedures and ways for legal and administrative enforcement, thereby considerably enhancing the level of protection.
进一步完善了司法和行政执法的程序和途径，大幅度地提高了保护水平。
