“按惯例”用英语怎么说？

这些工作组将按惯例工作。These working parties will be going over well-trodden ground.按惯例，这一领导职务的副职总是由女性担任。By convention the deputy leader was always a woman.他们按惯例前往墓地悼念死者。They made their way to a graveyard to pay their traditional r...