piston scraper ring
基本释义
活塞刮油环
实用场景例句
医疗研究
The study compared mortality rates for pneumonia in different age groups.
该研究比较了不同年龄组肺炎的死亡率。
新闻报道
Vaccination is recommended to prevent pneumonia in vulnerable populations.
疫苗接种被推荐以预防脆弱人群的肺炎。
日常对话
He was diagnosed with pneumonia after developing a high fever.
他在发高烧后被诊断为肺炎。
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