逆流

against the stream / adverse current / a countercurrent / fig. reactionary tendency / to go against the trend

contrary / opposite / backwards / to go against / to oppose / to betray / to rebel

to flow / to disseminate / to circulate or spread / to move or drift / to degenerate / to banish or send into exile / stream of water or sth resembling one / class, rate or grade

to go back to the source

equatorial counter current

to sail against the current / (fig.) to go against the flow