英汉词典

1. 大量的;相当程度的;重大的
    Substantial means large in amount or degree.

    e.g. The party has just lost office and with it a substantial number of seats...
           该党刚刚竞选失利，同时还失去了许多席位。
    e.g. That is a very substantial improvement in the present situation.
           在当前形势下这是一个非常巨大的进步。

2. (建筑物)大而坚固的，结实的，牢固的
    A substantial building is large and strongly built.

substantial

    e.g. ...those fortunate enough to have a fairly substantial property to sell.
           那些有相当多的固定资产可出售的幸运儿