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upon和from的区别()theregistration,atrademarkisusuallygrantedforaperiosoftenyears.为什么不选from而选了upon。

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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。
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答案和解析
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.