chert [tʃɜ:t]

例句:

• Thus we can better understand the deformation of chert in a highly fluid form.
  这样我们就能更好地理解燧石在高度流体状态时的变形情况.
  
• The sediments in this photo curve near the ends of chert pods.
  这沉淀物在这幅图片的曲线近似冷凝物的黑矽石的扁豆形矿体.
  
• Paleontologists know chert as a good place to look for fossils.
  古生物学者知道黑矽石同样的好地方去观看化石.