实际实物生产率
marginal physical productivity
最大实际高度
maximum practicable height
PC机内存实际物理地址
PC memory real physical address
按实际可达到的尽可能低
as low as reasonably achievable
ALARA
抱不切实际的想法
get ideas into one’s hand
变扭器实际出厂编号
effective torque converter serial number
波实际到达时间
The actual arriving time of wave