在水灾的语境中，描述物体或人被大水冲走的情景，英语中常用的表达确实有 “be swept away by a big flood” 和 “be washed away by a major flood”。以下是对这两种表达方式的具体说明：
1. “be swept away by a big flood”
这个表达中的 “sweep” 一词形象地描绘了洪水如同巨力般将物体或人卷走。这里，“sweep”通常意味着迅速且有力地移动，常用来形容水流的猛烈。
例子：
- The house was completely swept away by the big flood last night.
- Many animals were swept away by the big flood, leaving their habitats destroyed.
2. “be washed away by a major flood”
在这个表达中，“washed away”更侧重于描述洪水冲刷物体的过程，暗示了一种更为缓慢和持续的动作。而“major”一词强调了洪水的严重程度。
例子：
- The village was washed away by a major flood, displacing its residents.
- The ancient ruins were almost entirely washed away by the major flood, leaving only a few remnants.
使用建议
- 如果你想要强调洪水迅猛的冲刷力量，可以选择 “be swept away by a big flood”。
- 如果你想要表达洪水持续冲刷，最终导致物体或人消失的效果，则 “be washed away by a major flood” 是更合适的选择。
在实际应用中，这两种表达可以根据具体语境和需要传达的情感进行选择。