Modern science is based on observation on experiment, and on measurement.
现代科学是建立在观察、实验和度量的基础上的。
His study is based on close observation of human behavior.
他的研究是根据对人类行为的仔细观察。
His work is based on a synthesis of observation and traditional painting theory.
他的工作是基于对合成的观察与传统绘画理论。
Based on my personal experience and observation, I found some important reasons to volunteer.
根据我的个人经验和观察，我发现有很多重要的理由去做义工的。
Based on my personal experience and observation, I found some important reasons to volunteer.
根据我的个人经验和观察，我发现有很多重要的理由去做义工的。
应用推荐