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1. The SSI is responsible for monitoring the health of our community.
SSI负责监测我们社区的健康。
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2. The SSI has made significant progress in reducing pollution levels.
SSI在减少污染水平方面取得了重大进展。
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3. The SSI is working on a new project to improve public transportation.
SSI正在开展一个新项目，以改善公共交通。