boulangerite

例句：

1. 1.The boulangerite is a type of rock that has been used for centuries in the making of bread.
   面包石是一种用于制作面包的岩石类型，已有数百年历史。
2. 2. In ancient times, boulangerite was often found in the form of small pebbles or fragments on the surface of loaves of bread.
   在古代，面包石通常以小石子或碎片的形式出现在面包表面。
3. 3. Today, boulangerite is still used in some bakeries to make their bread more flavorful and moist.
   如今，在一些面包店中，面包石仍被用来使面包更加美味多汁。