They have the power to hire and fire managers and say yea or nay to big investment projects. 他们有权聘用和解雇经理，批准或否决重大投资项目。
They are waiting for the chance to be able to vote yea or nay on their local leaders.
I don't think he's decided yea or nay as yet.
The actor reads the whole of every script before saying yea or nay.