strong caustic

例句：

1. 1. The chemical was very strong caustic, and it could cause severe burns.
   这种化学物质非常强酸，可能会导致严重的烧伤。
2. 2. The plant's leaves are covered in a strong caustic substance that protects them from herbivores.
   这种植物的叶子上覆盖着一种强酸物质，可以保护它们免受食草动物的侵害。
3. 3. The caustic solution is used to dissolve metals, making it useful for metalworking.
   这种强酸溶液被用来溶解金属，使其在金属加工中非常有用。