n.第八十;八十分之一;
adj.第八十的;八十分之一的;
例句:
We are going to celebrate our granduncle's eightieth birthday.
明天我们要给舅爷过八十大寿.
Nano-particle size is only one eightieth of the hair, also known as Advanced Micro Devices particles.
纳米 粒子大小只有头发丝的八十分之一, 也被称为超微颗粒.
Mr Stevens recently cele-brated his eightieth birthday.
史蒂文斯先生最近庆祝了他的80大寿。