present in

• The transacetylase system was also present in spinach leaves .
  在菠菜叶片中也存在着转乙酰酶系统。
• The play was presented in a large walled-in courtyard .
  这出戏是在一个四周有围墙的大院子里演出的。
• Two basic types of clay minerals are present in most soils .
  大多数土壤中出现了两类主要的粘土矿物。
• Many unavoidable random spots are always present in the film .
  胶片上免不了会有许多乱七八糟的斑点。
• That polyacetylenes are present in flames has been demonstrated many times .
  已多次证实火焰中存在聚乙炔。
• A flow chart of aluminum processing waste stream is presented in figure 22 .
  图22示出铝生产废水的流程图。
• Those heavy white clouds almost always present in river landscapes .
  这些厚厚的白云几乎一直是河上景色的点缀。
• Host specialization of strains is present in one geographical locality .
  在某一地理场所菌系具有寄生主的专化性。
• The mathematical material is presented in chapters of work on astronomy .
  数学材料是夹在天文著作的篇章里讲述的。
• We must use the smallest size of solid present in appreciable quantity .
  我们必须用具有相当数量的最小颗粒的粒度。