graphite dust

例句：

1. 1. The scientist used a special machine tocollect the graphite dust.
   科学家使用一种特殊的机器来收集石墨粉尘。
2. 2. Thegraphite dust was sofine that it could easily passthrough the filter.
   石墨粉尘非常细小，可以轻松穿过过滤器。
3. 3. The graphite dustwas dangerous to breathe in, so theywore masks when handling it.
   石墨粉尘对呼吸有害，所以他们在处理时都戴着口罩。