These properties are a small average particle length, a relatively stiff fiber which prevents packing, and therefore tends to give a sheet of paper with high bulk and good opacity.
这些特性包括较低的平均微粒长度，相对挺硬不易聚集，因此可以使纸页有较高的松厚度和不透明度。
The study also shows that the ignition and combustion of boron particle lie on the resorting time and the environment temperature, and have no direct relationship with after-burning chamber's length.
研究还发现，硼颗粒的点火燃烧主要取决于硼颗粒在补燃室内的滞留时间和所处的环境温度，而与补燃室的长度没有直接关系。
Sieve diameter is the length of the side of a square sieve opening through which the given particle will just pass .
“筛析粒径”是指一个四方筛孔的边长，某已知的颗粒将恰好通过这筛孔。
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