high-ash content

例句：

1. 1. The coal has a high ash content, which makes it difficult to burn.
   这种煤的灰分含量很高，难以燃烧。
2. 2. The high ash content in the coal can cause environmental pollution.
   煤炭中的高灰分含量会导致环境污染。
3. 3. In order to reduce the environmental impact, the company is trying to increase the low-ash content of its coal.
   为了减少环境影响，该公司正试图提高其煤炭的低灰分含量。