他在遗嘱中留下了一大笔钱。

He left a ___substantial sum of money in his will.

他小说的初稿需要大量的重写。

The first draft of his novel needed a ___substantial amount of rewriting.

调查结果显示，男女观点之间存在很大的差异。

The findings show a ___substantial difference between the opinions of men and women.