查询词典 decay

Radioactive decay studies have found a kinds of elements can be α or β decay and the decay into another element, while the α-decay product of -α-rays became one of the deep structure of the material means of .1911, the Rutherford and others bombarded atoms with α-rays observed wide-angle deflection to determine the nuclear structure of atoms and nuclei was first proposed the term .1919 year, Rutherford and others have also found that with α-ray bombardment of nitrogen will release the nuclear protons, this is the first time Artificial realization of a nuclear reaction, after the bombardment of nuclei with the radiation caused by nuclear reaction method to become the primary means of research in nuclear.

放射性衰变研究发现了一种元素可以通过α衰变或β衰变而变成另外一种元素，而α衰变的产物——α射线又成了人们探讨物质深层结构的手段。1911年，卢瑟福等人用α射线轰击原子、观察到大角度偏折，从而确定了原子的有核结构，并首次提出原子核这一名词。1919年，卢瑟福等人又发现用α射线轰击氮核会放出质子，这是首次用人工实现的核反应，以后用射线轰击原子核来引起核反应的方法逐渐成为研究原子核的主要手段。

Alpha decay and beta decay are generally slower processes than gamma decay.

衰变和β衰变一般比γ衰变为慢。

Baby bottle tooth decay can be said of children's serious tooth decay, its causes and adults in general similar to tooth decay, but also has its special formation background.

奶瓶性蛀牙可说是幼儿的严重蛀牙，其原因和大人一般蛀牙类似，但也有其特殊形成的背景。

According to the Weisskopf-Wiger theory, the spontaneous emission decay in the free space is following an exponential decay law with the constant decay rate.

在第二章中，主要研究了多层结构中二能级原子非马尔科夫自发衰减过程的记忆函数。

This study examined the alumina ceramic membrane to deal with high turbidity water flux changes in the law of decay was found in the early running flux decay rapidly, the latter tends to slow decay, a linear decline in the overall. 51qikan.

Key words： high-alumina ceramic membrane separation of water turbidity摘要：本实验研究了氧化铝陶瓷膜处理高浊度水时膜通量衰减变化规律，发现运行初期膜通量衰减很快，后期衰减趋于平缓，总体成线性下降。

The experimental results revealed that 60% of cell decay in a nitrifying system was caused by activity decrease and 40% was caused by cell death. In a heterotrophic system, however, activity decrease was responsible for 80% of cell decay, and the other cell decay for 20% was caused by cell death.

结果表明，硝化系统细菌在衰减过程中由细胞活性降低引起的衰减约占60%，由细胞死亡引起的衰减约占40%；而在异养系统中由活性降低引起的衰减和由细胞死亡引起的衰减分别为80%和20%。

In the BNR system (SRT=15 d), the cell death was responsible for 45% of the total cell decay for nitrifying bacteria, and thus the activity decay accounted for 55% of the total cell decay.

在BNR系统中（SRT=15 d），硝化细菌在衰减过程中由细胞死亡引起的衰减约占细胞总衰减的45%，由活性降低引起的衰减约占细胞总衰减的55%。

This paper presents a new chlorine decay model adaptable to the real multi-source network, using Epanet-msx simulation module, comparing the differences in the concentration of chlorine caused by using the same or different chlorine decay rate coefficient of the treated water from different water plants, and then taking the discrepancy of the chlorine decay rate coefficient into consideration will be able to reflect residual chlorine concentration and changes in the network more realistically.

通过建立符合实际工况的多水源余氯衰减模型，运用Epanet-msx水质模块进行模拟运算，对比不同水厂余氯衰减系数同一化处理和差异化处理对管网余氯浓度造成的差别，可以看出差异化处理将能更真实地反应管网中余氯浓度的分布和变化情况。

There are remarkable differences among different succession community of the fallen tree and snag in terms of their volume and decay degree and decay degree of the fallen. The distribution trend generally abides by the rule of increasing with the succession. The decay degree obeys normal distribution.

通过研究表明：长江上游暗针叶林生态系统的CWD总量是101.74 m3/hm2，它的组成体--倒木和站杆在不同演替阶段的容积和腐烂程度是明显不同的，随演替递进，程度加大，分布呈正态分布。

M 3/hm 2. There are remarkable differences among different succession community of the fallen tree and snag in terms of their volume and decay degree and decay degree of the fallen. The distribution trend generally abides by the rule of increasing with the succession. The decay degree obeys normal distribution.

通过研究表明：长江上游暗针叶林生态系统的CWD总量是 10 1 74m3/hm2 ，它的组成体———倒木和站杆在不同演替阶段的容积和腐烂程度是明显不同的，随演替递进，程度加大，分布呈正态分布。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？