Terrestrial means ``Earth-like'', and these four planets are all Earth-like in that they are made mostly of rock and metal and have relatively high densities.
(Terrestrial; means; Earth-like) (these four planets; are; Earth-like; L:in that they are made mostly of rock and metal and have relatively high densities) (they; are made; )
Terrestrial these four planets they
means are are made
Earth-like
Earth-like L:in that they are made mostly of rock and metal and have relatively high densities