So the weather satellites are _of_ great help to the scientistsat the station,in the past they could forecast the weather for about 24 or 28 hours earlier.为什么是of?
问题描述:
So the weather satellites are _of_ great help to the scientists
at the station,in the past they could forecast the weather for about 24 or 28 hours earlier.
为什么是of?
答
of great help =helpful
记住类似的这种用法.