One angstrom per second per second would take a body from rest to near the speed of light in the lifetime of the universe. 静止的物体如以每秒每秒一埃的加速度起步要达到光速,需要的时间会像宇宙年龄这麽长。
angstrom
[ noun ] a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation <noun.quantity>