fraction

• A population is a whole, and a sample is a fraction or segment of that whole .
  总体是所研究的现象全体；样本则是总体中的一部分。
• In oil seeds they may occupy a large fraction of total volume of reserve cells .
  在油质种子中，它们可占据贮藏细胞总体积的大部分。
• The roche limit for the earth is a small fraction of the radius of the moon's orbit .
  地球的洛希极限相当于月球轨道半径的一小部分。
• He claims that by using a sequence of solvents a series of fractions can be obtained .
  他指出，用这样一系列溶剂，可以得到一系列级分。
• Erodible soil fractions are usually dislodged from projections and trapped in depression .
  可冲蚀土壤部分经常从凸出物剥蚀并降落于洼地。
• It will be much easier to understand if the fractions are rounded up to the whole numbers .
  如果把分数调高为整数，那么就更加容易理解了。
• It occurs as an exchangeable base in the clay mineral and organic fractions of soils .
  钙是以交换性盐基在粘土矿物及土壤的有机部分出现的。
• What fractions of npp are invested in allelochemic substances in different communities ?
  在不同的群落的NPP中究竟有多大部分投入他感化学物质？
• The lack of fine fractions in the expanded clay necessitates the addition of other aggregates .
  膨胀性粘土缺乏细料部分，故必须添加其它骨料。
• A plasma is a gas in which a significant fraction of the atoms or molecules are ionized .
  等离子体是一种其中大部分原子或分子都已电离的气体。