Most of the money would come from a penny-per-letter permanent rate increase and from shifting postal retirees into Medicare.
大多数钱是通过提高每封信一便士的永久利率和将邮政退休员工转嫁到医保系统的方式筹集。
2
Derivative action (referred to by the letter d) measures and responds to the rate of change of process signal, and adjusts the output of the controller to minimise overshoot.