"Solar system planets" 表示太阳系中的行星。
"Solar" 来源于拉丁语 "sol",意为 "sun","system" 来源于希腊语 "systema",意为 "organized whole"。
例句:
There are eight planets in the solar system.
(太阳系中有八颗行星)
The solar system's largest planet is Jupiter.
(太阳系中最大的行星是木星)
Mercury is the closest planet to the sun in the solar system.
(水星是太阳系中离太阳最近的行星)