老化

During the process of long-time adaptive evolution, wetland plants adopted a series of special strategies to acclimate to salt stress. The main strategies are: 1 life history adjustment, e. g., to adjust seed germination time, implement seed dormancy and viviparity, and change reproductive manner to escape from direct salt stress, 2 morphological adjustment, e. g., to adjust biomass allocation pattern, age stem, defoliate, and carnify vegetative organs to isolate the redundant Na(superscript +) to the inactive-metabolism shoots or exclude the Na(superscript +)from tissues; 3 anatomic adjustment, e. g., to sink stoma, develop aerenchyma, and thicken cuticle and phellogen to maintain normal photosynthesis and respiration; 4 physiological and biochemical adjustment, e. g., to exclude and excrete salt, compartmentalize ions, adjust osmosis, do selective absorption, regulate hormones, and induce antioxidative enzymes to maintain the osmotic equilibrium and eliminate the active oxygen in cell; and 5 molecular level adjustment, e. g., to start up many salt-induced genes to regulate the metabolic responses to salt stress.

在长期的适应进化过程中，湿地植物形成了多种适应盐胁迫的策略，主要有：1生活史方面，植物可通过种子萌发时间的调整、种子体眠、胎生、繁殖方式的改变等逃避盐度的直接伤害；2形态学方面，植物可通过生物量分配模式的调整、茎的老化、落叶及营养器官的肉质化等将多余的Na隔离到代谢不活跃的茎中或将其排出体外；3解剖学方面，植物可通过气孔下陷、发达的通气组织、增加细胞木栓层、角质层及栅栏组织的厚度等以维持植物正常的光合作用和呼吸作用；4生理生化方面，植物可通过离子区隔化、拒盐、泌盐、选择性吸收、渗透调节、激素调节及抗氧化物酶的诱导等来维持细胞内正常的渗透压，清除胞内活性氧分子；5分子水平方面，植物可通过多种与盐胁迫相关的基因来调控细胞内的多种代谢反应。

At the same time, the density of silica aerogel was controlled by the amount of ethanol due to its filling in the free space.

此外还研究了不同的老化条件以及表面活性剂对SiO_2气凝胶制备的影响。

The test resultsshow that friendly interface,simple operation,accuratedata,reliability and stability are obtained.The real-timemonitoring for all of the sensors in aerometry orlong-term test can be realized by this system.

该软件界面友好，操作简单，数据结果准确，并且运行可靠、稳定，既可以实时显示各传感器的全部动态响应过程，又可以进行长时间老化试验的观测。

As we can see from these statements, the truth of ageing appears to have been transformed and no age-group can be excluded from this reconstruction.

正如我们所看到的，这些声明，年老化的真相似乎已经改变，没有年龄组可以从该重建之外。

Population ageing is one of the most important problems is the world.

人口老化是当今世界最重要的问题之一。

This is a human problem of an ageing phenomenon.

这是人体机能老化的一种现象。

It is this damage that is thought to be an underlying cause of ageing and disease.

正是这种损害，被认为是一个根本原因的老化和疾病。

This is not the relationship between ageing.

这并非年龄老化的关系。

The performance of this material system is demonstrated by ageing tests.

材料系统的性能是通过老化测试体现出来的。

In this paper, a smart control system for semiconductor laser ageing test is described.

本文介绍了一个能对半导体激光器进行老化测试的智能控制系统。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。