拱線轉(zhuǎn)動 line of apsides: 拱線長度apsides: 半圓形屋頂; 拱點rotation line: 轉(zhuǎn)動線apsides apsis: 的復(fù)數(shù)by rotation: 輪流地下載手機詞典可隨時隨地查詞查翻譯