来自拉丁语 sol,太阳，-ar,形容词后缀。

solar

solar: [15] Solar comes from Latin sōlāris, a derivative of sōl ‘sun’. This went back to the same ultimate Indo-European base, *su-, that produced English sun. Solarium [19] was borrowed from another Latin derivative, sōlārium, which denoted a ‘sundial’ as well as a ‘balcony, flat rooftop, or other part of a house exposed to the sun’. Solstice [13] means etymologically the ‘sun standing still’. It comes from Latin sōlstitium, a compound formed from sōl and stit-, the past participial stem of sistere ‘make stand’.
=> solarium, solstice

solar (adj.)

mid-15c., "pertaining to the sun," from Latin solaris "of the sun," from sol "sun" (see sol). Meaning "living room on an upper story" is from Old English, from Latin solarium (see solarium). Old English had sunlic "solar."

Astrological sense from 1620s. Meaning "operated by means of the sun" is from 1740; solar power is attested from 1915, solar cell from 1955, solar panel from 1964. Solar system is attested from c. 1704; solar wind is from 1958. Solar plexus (1771) "complex of nerves in the pit of the stomach," apparently so called from its central position in the body (see plexus).

1. Saturn is the second biggest planet in the solar system.

土星是太阳系中的第二大行星。

来自柯林斯例句

2. The roof has been ingeniously designed to provide solar heating.

房顶经过巧妙设计，可提供太阳能取暖。

来自柯林斯例句

3. the heliocentric model of the solar system

太阳系的日心模型

来自《权威词典》

4. the planets of our solar system

太阳系的行星

来自《权威词典》

5. renewable sources of energy such as wind and solar power

像风力和太阳能这种用之不竭的能源

来自《权威词典》