知识扩展
易混词辨析
significantly、considerably、substantially
1. substantially：副词 “大幅度地；实质上；主要地（指程度、数量上的显著变化或本质上）”（如 reduce costs substantially 大幅度降低成本；change substantially 发生重大变化；substantially correct 本质上正确）；
2. 与 significantly（副词 “显著地；明显地（指效果或影响明显）”，如 improve significantly 显著改善；differ significantly 明显不同）近义，substantially 侧重 “程度或数量的大变化”，significantly 侧重 “效果或影响的明显”（reduce by 50% substantially 大幅度减少 50%，improve significantly 效果显著改善）；
3. 与 considerably（副词 “相当大地；非常（指程度高）”，如 older considerably 年纪大得多；cost considerably more 贵得多）区别：considerably 侧重 “程度高”，substantially 侧重 “变化大或本质上”（a considerably large house 相当大的房子，a substantially different house 本质上不同的房子）。
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