例句與造句

1. In his conception, the angle used is the deviation from the direction of the curve at some fixed starting point, and this convention is sometimes used by other authors as well.
2. In the two examples above, the field is the field of the real numbers and the set of the vectors consists of the planar arrows with fixed starting point and of pairs of real numbers, respectively.
3. It's difficult to find fixed starting point in a sentence. 用fixed starting point造句挺難的