While we'll learn a lot with the great instruments we have aboard the rover, it may very well require the far more well-equipped laboratories and delicate instruments back here on Earth to tell us whether our samples carry evidence that Mars once harbored life.
请问老师们,这句话中it作形式主语,不定式作真正主语吗?还是说不定式作宾补,那it指什么呢?
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