Objectives : the course is designed to make student understanding the physical and chemical principles of aerosol and instruments used to measure them 教学目的：本课程的目的是使学生了解有关气溶胶的物理和化学特性以及一些基本测量方法。
They ' re microscopic tubes made of a remarkable form of soot and have chemical properties that make them stronger than steel and lighter than plastic 它们是显微结构的管子，由一种著名形式的烟炭构成，它们所具有的化学特性使其比钢硬、比塑料轻。
Isotopes are different varieties of the same type of atom , all completely identical in their chemical behavior , but differing slightly in their atomic weight 同位素是同一原子的不同品种，具有完全吸纳共同的化学特性，只是它们的原子核重量有点不同。
Its unique atmosphere and the wild chemistry on its many moons could shed light on how the planets - - and possibly life - - formed in our solar system 它独特的大气层和其众多卫星上惊人的化学特性有可能昭示行星，或者生命，是怎样在我们的太阳系形成的。
The number of protons , which are positively charged particles , determines the chemical properties of the atom , e . g . whether it will bond with other atoms to form molecules 组成，带正电质子的数目，决定了该原子的化学特性，例如它会否和其他原子结合成分子等。
Micro - coiled carbon fibers are of great potential as electromagnetic absorptive materials and hydrogen storage medium because of their excellent physical and chemical properties 摘要螺旋炭纤维具有优异的物理和化学特性，在电磁波吸波材料、氢气存储等领域极具应用价值。
The mlap was modeled with different methods , then analyses the model with software . the result indicates that the geno3d model is good in stereochemistry and biology function 结果表明用geno3d预测方法得到的结果比用其它方法的模型更符合立体化学特性和生物学功能的规律。
A description of the properties of high - speed machining tool , and its physical properties , chemical properties analysis synthesis of the said sub - machining properties 摘要阐述各种高速切削加工刀具材料的性能，并分析其物理特性和化学特性以及不同的成分合成对机械加工性能的影响。
Selects products for tests at specified stages of production process , and tests products for variety of qualities , such as dimensions , performance , and mechanical , electrical , or chemical characteristics 在生产指定阶段进行产品各方面质量测试，如尺寸、性能以及机械、电力或化学特性。
You can contact your supplier or manufacturer of goods to obtain the material safety data sheet ( msds ) which shows the physical and chemical properties of goods 你可以联络你货品的提供人或制造商去取得一份物料安全资料报告，即materialsafetydatasheet (简称msds ) ，去取得物料的性质及化学特性。
