例句與造句

1. E . g . you are flying at 600mph and the other plane is at the same speed but on a three degree different course from you ( a barely noticeable difference in direction ) it would seem to have a motion relative to you of 30mph directly sideways-i . e . pretty fast.
2. It's difficult to find barely noticeable difference in a sentence. 用barely noticeable difference造句挺難的