kē xué jiā / chí xù / jiān cè / chòu yǎng céng / de / biàn huà / yǐ / píng gū / dà qì huán jìng / de / cháng qī / qū shì

科学家持续监测臭氧层的变化，以评估大气环境的长期趋势。

Scientists continuously monitor changes in the ozone layer to assess long-term trends in the atmospheric environment.