例如,如果一只信鸽要用它的太阳罗盘进行导航,它必须根据日光/黑暗的循环所提供的线索正确设置时间。
For instance, if a homing pigeon is to navigate with its Sun compass, its clock must be properly set by cues provided by the daylight/darkness cycle.
太阳罗盘(指南针)是一个能依据太阳或月亮的位置指示北方的程序。
Sun Compass is a program to show the north direction from the sun or moon position.
西欧人也已经发明并且使用了磁罗盘,当云彩同时遮住了太阳和星星时,它就能起作用。
Western Europeans had also developed and put into use the magnetic compass, which helped when clouds obliterated both the Sun and the stars.
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