mass n. 弥撒;弥撒的仪式[祷告、音乐];弥撒曲。 a high [solemn] Mass (有烧香、奏乐等的)大弥撒。 a low [private] Mass (无烧香、奏乐的)小弥撒。 by the Mass 一定,的确。 say [read] Mass 作弥撒,念经。 n. 1.块,堆,团。 2.群众,集团;〔the masses〕群众;民众。 3.大量;大宗;众多;〔the mass〕大部分,大半;主体;总体。 4.【物理学】质量。 5.【军事】集团纵队,密集队形。 6.【矿物】体。 a mass of earth 一大块泥土。 a mass of letters 一大堆信件。 The masses have boundless creative power. 人民群众有无限的创造力。 a mass of manoeuvre 实施机动集团。 proper mass 静质量。 the masses 群众,大众。 be mass of 一团…,全身…,遍体…(He is a mass of bruises. 他遍体鳞伤)。 from the masses, to the masses 从群众中来,到群众中去。 in the mass 整个儿地;总体上,合计。 the (great) mass of... …的大部分。 to be at one with the masses 同群众打成一片。 vt. 使成一团;集中(力量等);【军事】使密集。 vi. 集中,聚集。 massed body 【军事】密集部队。 massed formation 【军事】密集队形。 mass action 【物理学】质量作用;浓度作用。
Nitrogen dioxide and sulfur dioxide and formaldehyde , three kinds of common contaminating gases , were selected as treatment subject . the influence factors on the rate of photocatalytic degradation such as intensity of uv irradiation , humidity and initial mass concentration were investigated in detail 实验选择比较常见的甲醛、二氧化硫、二氧化氮三种污染气体为处理对象,主要考察了光强、湿度、初始浓度对其光催化降解速率的影响情况。
Comparing with the current observations , which include the number density distribution in space , mass function , etc . , the so - called standard modes for both the power law and gaussian cluster initial mass functions are selected among many runs of simulations . the deviation from the standard modes , which is resulted from the change of the parameter for the initial conditions , is discussed in detail . the discussion of the model parameters is also presented although they are adopted as the typical values based on previous work 对应一定的初始分布我们发现无论是幂律的还是对数高斯的球状星团初始质量谱经过长时间的动力学演化都会得到和现在银河系观测到的球状星团系统相符的对数高斯的质量分布;动力学演化会明显地改变球状星团系统的空间密度分布,靠近银心区域的球状星团瓦解得更多;经过动力学演化后的球状星团速度分布函数在靠近银心的区域明显得不同于初始分布,初始拥有较大轨道偏心率的球状星团更容易瓦解。
The number density distribution of globular cluster in space will change with time due to the dynamic evolution , especially for those in the central region of the galaxy ; 5 . for the power law initial cluster mass function , the peak value of the mass function after the dynamic evolution is sensitive to the lower limit of the initial mass function we adopt . the suggested value in this paper is - 104m , which is consistent with that reduced from the dynamical analyses for the giant molecular clouds 对于幂率的初始质量谱,球状星团系统动力学演化后质量分布的转折点质量主要是由初始质量函数的质量下限决定的,最为适合的值为10 ~ 4m _ ;幂率的初始质量谱的谱指数对球状星团系统动力学演化后质量分布的转折点质量也有影响,其最佳值为1 . 5 2 . 0 ;经过大约5gyr的动力学演化,幂率的初始质量谱就会演化成为高斯的对数质量分布并具有在随后的动力学演化中保持对数高斯形式质量分布的特性。