酸雨

There is acid rain in the precipitation of 98 cities, accounting for 91.6% of the cities in the Acid Rain Control Zone.

南方地区酸雨污染较重，酸雨控制区内90%以上的城市出现了酸雨。

Taking the seedlings of Quercus glauca, a dominant evergreen broadleaf tree species in subtropical area, as test materials, this paper studied their photosynthesis, chlorophyll fluorescence, and chlorophyll content under effects of simulated acid rain with pH 25, 40, and 56. After 2-year acid rain stress, the net photosynthetic rate of Q.

选择亚热带常绿阔叶林优势树种青冈幼苗为研究对象，设置3个酸雨处理：pH 2.5、pH 4.0、pH 5.6，研究不同强度的模拟酸雨对青冈幼苗光合特性、叶绿素荧光参数和叶绿素含量的影响。

This suggested the corresponding stress reaction of acid rain on the carmine spider mite was quite significant.

酸雨对朱砂叶蜗寄主植物的作用植物是酸雨的主要受体，也是昆虫生存最重要的因子。

The research indicated that the variation of rain acidity,acid rain frequency and the equivalent concentration ratio of the chief anion ions to positive ones all presented conspicuous ascending trend,the chemical component of the rain was primarily influenced by the acidic gas and marine...

研究表明，深圳市降水酸性、酸雨频率以及酸碱离子当量浓度比值都呈显著的上升趋势，降水的化学成分主要受到社会经济活动产生的酸性气体以及海盐成分的影响，深圳及珠三角地区二氧化硫和氮氧化物排放量的增加是酸雨日益严重的重要原因。

Primary results are shown as followings: 1. PH measuring results of soil solution and eluviation solution show that the ability of experimental plot the acid buffer capacity of soil is stronger under the experiment condition,there is no obvious acidification in soil which after acid rain eluviation. The result has substantial differences with that gotten by most of investigationers in similar work before.

这一结果与以往类似研究中多数研究者得到的结论存在本质区别，原因可能在于此次试验的试验条件与以往研究的试验条件不同，其中最主要一点是在本次试验中使用的土壤样品的重量比以往试验均显著增大，而且使用的是土壤结构和组成等均未经破坏的原位土，从而使入渗酸雨与承受酸雨沉降的土壤之间的比例关系更接近自然酸雨沉降过程，以此为基础得到的试验结果应该更加客观、可靠。

In order to complete the investigation, impersonality feasible experiment solutions and devices are designed independently to systemically investigate on activation and transfer characteristic of soil heavy metal under acid rain effect. Primary results are shown as followings:1. PH measuring results of soil solution and eluviation solution show that the ability of experimental plot the acid buffer capacity of soil is stronger under the experiment condition,there is no obvious acidification in soil which after acid rain eluviation.The result has substantial differences with that gotten by most of investigationers in similar work before.

这一结果与以往类似研究中多数研究者得到的结论存在本质区别，原因可能在于此次试验的试验条件与以往研究的试验条件不同，其中最主要一点是在本次试验中使用的土壤样品的重量比以往试验均显著增大，而且使用的是土壤结构和组成等均未经破坏的原位土，从而使入渗酸雨与承受酸雨沉降的土壤之间的比例关系更接近自然酸雨沉降过程，以此为基础得到的试验结果应该更加客观、可靠。2、酸雨对盐基离子活化迁移产生的影响勿庸置疑，但是，在盐基离子活化迁移的过程中，并没有出现预想中的重金属元素活化迁移现象，表明土壤中的重金属元素并不如理论分析的那样对酸雨沉降反应敏感。

The injury threshold values of most plants are observed at pH 2.0~3.5 designed in this experiment. However, those of Brassia campestris, Viola tricolors and Zephyranthes candida are not fixed at pH 2.0. It indicates that three herbaceous ornamental plants own a strong resistance to acid rain.

在设定的酸雨胁迫强度(pH 2.0~3.5)下，多数植物的伤害阈值可被确定，惟有羽衣甘蓝、三色堇和葱兰在pH2.0酸雨胁迫下仍无法确定其伤害阈值，表明此3种草本观赏植物对酸雨有极强抗性。

The classification of acidification indices about the tested the litchi orchard soil: the first class was soil intensity index of exchangeable aciditypH(KCl, exchangeable acidity, exchangeable aluminium, titratable acidity, actual acidification velocity , cation exchange capacity or electrical conductivity; the second class was soil exchangeable Ca2+, total base or base saturation percentage; The third class was soil intensity index of active aciditypH

采用第一类酸化指标，pH2.5的酸雨淋溶引起了供试土壤的酸化；采用第二类酸化指标，除pH2.5的酸雨淋溶引起了供试土壤的酸化外，pH3.5的酸雨淋溶引起了供试土壤的表层土壤酸化；采用第三类酸化指标，pH≤4.5酸雨淋溶引起了供试土壤不同程度的酸化。

With decreasing in pH value and increasing in ion concentrations of simulated acid rain, extensively leached by simulated acid rain, the contents of heavy metals in leachates from the rebuilt soil columns are increased with increasing the acidity of simulated acid rain.

在模拟酸雨强烈淋洗下，随模拟酸雨pH值下降和离子浓度增加，土壤柱中重金属的淋出量随模拟酸雨酸度增加而增加。

There was difference on leakage of substance amongred leaves,greening leaves and functional leaves,among flower buds,initially blooming flowers and fully blooming flowers treated with acidrain of the same pH value.

当酸雨的pH＜3.5时，各指标值急剧增加且变化趋势一致；当酸雨的pH＞3.5时各指标对酸雨的敏感性不一样，K+最敏感，pH4.5的酸雨胁迫6h就可检测到K+的大量渗出，其渗出量与对照的差异达显著水平。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。