A line drawn on a weather map or chart linking all points of equal or constant temperature.
A line drawn on a weather map or chart linking all points of equal or constant temperature.
恒温线；等温线气象地图或图表上所画的一条连结同温或恒温各点的线
A line drawn on a weather map or chart linking all points of equal or constant temperature.
恒温线；等温线气象地图或图表上所画的一条连结同温或恒温各点的线