protection level的用法和樣例：
例句
- Adsorbate bacterins can vary in potency , which affects the level and duration of protection.
吸附菌苗在影響保護水平和時(shí)間的能力上可能不同。 - It has further completed the procedures and ways for legal and administrative enforcement, thereby considerably enhancing the level of protection.
進(jìn)一步完善了司法和行政執法的程序和途徑，大幅度地提高了保護水平。
