求翻译：为学生提供全美最干净，最安全的学习环境。特洛伊市环境优美，空气水质极其清新干净，温和的气候允许学生全年的户外活动不受影响是什么意思？

To provide us with the most clean, safe learning environment. Troy city beautiful, extremely fresh and clean air quality, the mild climate allows outdoor activities all year round for students are not affected