| 单词 | polar line |
| 释义 | Definition of polar line in English:polar linenoun ˌpəʊlə ˈlʌɪn
OriginMid 17th century (in an earlier sense). From polar + line. Definition of polar line in US English:polar linenounˌpəʊlə ˈlʌɪn
OriginMid 17th century (in an earlier sense). From polar + line. |
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