observationaladj.根据观察的；监视的observationn.观察；观察力；注意；评论Observational angle RVI观测角度比值植被指数（RVI）observation combination组合观测值observation of the work操奏视,工程检查Observation arrangement观测任务编排observation equivalence观测等价性observation environment观测环境observation and measure观测observation measurement定性测量observational astronomy观测天文学observational catalogue观测星表