China formally entered the ageing society in 1999, now it has been in the aging acceleration period.

中国在1999年正式进入老龄社会，并已经进入加速老龄化时期。

youdao

When the acceleration period has terminated, the switch means is controlled by a PWM pulse of the duty ratio in accordance with the speed instruction data, there by driving the DC motor.

在该加速期间结束时，以占空比与速度指令数据对应的PW M脉冲来控制开关机构，从而驱动该直流马达。

youdao

If I have a high acceleration, the period will be short, and that's exactly what you see.

如果有大的加速度，周期就短，那就是，你们所看到的。

youdao

If money growth continues its acceleration for a prolonged period it will finally trigger the beginning of the long awaited exit strategy of withdrawing reserves to offset the growth of the money expansion multiplier.

FORBES: Money Supply Growth Shows Stimulus Finally Getting Banks To Lend More

If the intercepting missile is ground-launched, it must have extremely high acceleration (15 to 30g over a one-minute period) so as to arrive at the target before burnout.

CENTERFORSECURITYPOLICY: Multilateral madness