当探测器到达距太阳表面4百万英里的高度时，太阳看上去将相当于从地球看上去的23倍那么大。
When the probe is 4 million miles away, the solar disk will loom 23 times wider in the sky than it does on Earth.
车头时距分布和到达分布是交通流理论中两个重要的分布。
Headway distribution and arrival distribution are two important distributions of traffic flow theory.
但由于具体的时距分布的对应到达分布不易推出，至今仍缺乏这方面系统的论述。
The Corresponding is very available, But so far, a systematic discuss on this item is lacking as seeking the arrival distribution corresponding by a particular headway distribution is not easy.
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