例文
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- Roger Bacon was the first to calculate the angular size of the rainbow.
- It has an angular size of 5.0'?2.1'and an apparent magnitude of 11.37.
- In addition, Bacon was the first to calculate the angular size of the rainbow.
- The perceived size of an object of constant angular size varies with its perceived distance.
- Extrapolating from this angular size chart, it will be 101 arcminutes on the same day.