查阅 参考 提及 came across refer to carry on with came across refer to by chance looked down upon/on show respect for It hit/struck/occurred to me that It happened that Once form that It hit/struck/occurred to me Once the rivers are polluted was not until I came back from office 遵守 庆祝 观察 注意到 show respect for A C for about with B into doing to do to do into doing to watch/watching for inspired a lot of poets to write in support of delivered an important speech to manage to leave to with about/over/on for behaviour is intended for observe the traditional customs |