从WISE的图像中估算蛇夫座ζ星的跨度约为1.5度，相当于12光年的距离。 （译者注：WISE— 美国宇航局广域红外探测器）
The WISE image spans about 1.5 degrees or 12 light-years at the estimated distance of Zeta Ophiuchi.
单层楼面的支座之间的距离，即跨度，不应超过5米，以便保证结构的刚度。
The span, or distance, between supports of a Single Floor should not exceed 5 metres in order to maintain a rigid construction.
以鸢尾花星云的距离推算，这张宽幅图片的跨度超过了30光年。
At the estimated distance of the Iris Nebula this remarkable wide field view is over 30 light-years across.
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