1. reflect on/upon --- v. prep. to consider sth carefully and at length.
1) As you get old you begin to reflect on the uncertainty of life. (=ruminate about)
2) reflect (up)on the future 仔细考虑未来
3) reflect on a problem 仔细考虑一个问题
4) reflect on what to do next考虑下一步怎么办
1) As you get old you begin to reflect on the uncertainty of life. (=ruminate about)
2) reflect (up)on the future 仔细考虑未来
3) reflect on a problem 仔细考虑一个问题
4) reflect on what to do next考虑下一步怎么办