observe upon

• 对 ... 发表意见； 谈论

observe upon的用法和样例：

例句

1. Wherever I went, I stumbled upon people talking about the issue.
   我走到哪儿都听到人们在谈论这件事。
2. I do not wish, however, to embark upon the subject of penal reform.
   但我并不想在此谈论刑法改革。