集合中的第一个点位于等于区段长度的第一段距离内。
The first point in a set lies at a distance equal to the segment length.
后续的每个点则位于区段长度加上原点到前一个点的距离的那一段距离内。
Each successive point lies at a distance of the segment length plus the distance of the previous point from the origin.
于是大家都出去了,在将近两英里的一段距离内,作了一次非常仔细的检查,可是峭壁光滑而陡峭,找不到一个洞穴。
They went out, therefore, and the exploration was made with extreme care, over an extent of nearly two miles. But in no place in the bare, straight cliff, could any cavity be found.
Here, in one second, it seems to have gone much further, so it's probably traveling faster.
在这一秒内,它似乎运动了更远的距离,所以这段时间它可能运动得更快
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