| 释义 |
par·sec AHD[pärʹsĕk'] D.J.[ˈpɑːˌsek]K.K.[ˈpɑrˌsɛk]n.（名词）- A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years, 3.086×1013 kilometers, or 1.918 × 10 13 miles. 秒差距：天文学自地球起的距离单位，星视差为1角秒，等于3.258光年，3.086×1013公里，或1.918×10 13英里
- par(allax) par(allax)
- sec(ond) 1sec(ond)1
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