类地行星和类木行星之间最明显的区别是它们的大小。
The most obvious difference between the terrestrial and the Jovian planets is their size.
同样，由于它们的相对位置，四颗类木行星被称为外行星，而类地行星被称为内行星。
Also, because of their relative locations, the four Jovian planets are known as the outer planets, while the terrestrial planets are known as the inner planets.
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