it seems 是插入语 似乎是
主干是:mars is not the dry old planet .火星不是一个干涸古老的星球
we once believed it to be 作补语修饰紧邻的“planet" .
即we once believed the planet to be dry and old.
如果只接” it ',则句不成句,
结构清楚了,
it seems 是插入语 似乎是
主干是:mars is not the dry old planet .火星不是一个干涸古老的星球
we once believed it to be 作补语修饰紧邻的“planet" .
即we once believed the planet to be dry and old.
如果只接” it ',则句不成句,
结构清楚了,