Please follow this line.

In meteorology, an isotherm refers to a line on a map that indicates the same temperature.

What does the tilde in this sentence mean?

This laser ray is very powerful.

Draw a straight line.

He is majoring in meteorology at university.

Cartography is an important field of study for visually representing geographic information.

He was staring at the horizon on the sea.

He was staring at the horizon.

He pointed at the location on the map.