1
- favouring; supporting表示“亲”, “支持”：
pro-choice.
2
- acting as a substitute or deputy for表示“副”, “代”：
proconsul.
3
- denoting motion forwards, out, or away表示“向前”; “向外”; “离开”：
proceed
propel
prostrate.
词源
from Latin pro 'in front of，on behalf of，instead of，on account of'.