upon 和from的区别
问题描述：
upon 和from的区别
（ ）the registration，a trademark is usually granted for a perios of ten years.为什么不选from而选了upon。
答
一经注册,商标通常会被授权10年.
upon,接events happened
from,接a particular time,such as today,3 o'clock,and ect.but not an event.
hope this help.