While unilateral intervention is unlikely to change long term trends, it is used to deter excessive speculation and attempt to reduce volatility in favor of more 'orderly' movement.

虽然单方面干预不大可能改变长期走势，但往往会威慑过度投机行为及降低波动，使走势更加“有序化”。

youdao

We remain skeptical about the long term effectiveness of unilateral JPY intervention as previous efforts have had only a short-lived impact.

因为前几次努力都只是产生昙花一现的效果，所以我们仍怀疑单边干预日元的长期效果。

youdao

The Annan plan was rejected because it failed to satisfy the basic concerns of the Greek Cypriots (right of return of refugees, security, permanent stationing of Turkish troops with a right of unilateral intervention, dysfunctional governance, etc).

ECONOMIST: Letters