下降的

The change of frequency, draws the conclusion through observing fish's respiratory rate and coughing: Luo is not the respiratory rate of fish and bright cloud porgy, drop with increase of Cu2+ density, cough frequency increases with increase of Cu2+density; Respiratory rate and frequency of coughing of black carp, appear downward trend after rising with Cu2+ increase of density first.

通过观察鱼呼吸频率和咳嗽频率的变化，得出结论：罗非鱼和彩云鲷的呼吸频率，随着Cu2+浓度的增加而下降，咳嗽频率随着Cu2+浓度的增加而增加；鲫鱼的呼吸频率和咳嗽频率，随着Cu2+浓度的增加都呈现先上升后下降的趋势。

Treatments with 20μmolL^(-1) CoCl2 and 20μmolL^(-1) AVG did not influence the contents of putrescine, spemidine, spermine, chlorophyll, and the production rate of reactive oxygen species. However, after 12h heat stress of 45℃, treatments significantly promoted the above values.

但经45℃高温胁迫12h后，20μmolL^(-1) CoCl2与20μmolL^(-1) AVG溶液处理显著提高了上述3种多胺的含量，减缓了抗氧化酶活性的下降，对活性氧水平及脂质过氧化水平的增加也起到了有效的抑制作用，这些改变可能对叶绿素降解的减少及膜稳定指数下降的减轻发挥着重要的作用。

And meanwhile, the result show that, stomatal restriction was the main factor of the net photosynthetic rate's decrease in the leaves of 4 Dactylis glomerata L. when stress in slight water stress and the non-stomatal restriction was the main factor of the net photosynthetic rate in the leaves of 4 Dactylis glomerata L.

盆栽控水条件下4份鸭茅光合作用机理的研究表明，随着干旱胁迫程度的加强，4份鸭茅种质的净光合速率、蒸腾速率、气孔导度及叶绿素含量均有较大幅度的降低，其中抗旱性强的ZXY04P-201下降的速度慢，幅度小，而抗旱性差的ZXY04P-239下降速度快，幅度大。

Biomass in the rain forest was far more than that in the plantation of 12 years,especially for the shrub layer.But the biomass of litterfall collected in the plantation was greater than that of the rain forest for the reason that Betula alnoidis defoliated in dry seasons.9 Four years observation found that soil bulk density tended to increase first, then decrease after planting trees;total soil porosity and non-capillary porosity tended to decrease and after few years they recovered to different degrees;the soil cation exchange capacity for all forest types increased;in the soil of 0-30cm depth,soil salt saturation tended to decrease;nutrient content in the soil of 0-60cm depth in the young stand tended to decline;soil effective P,effective K and N contents all tended to decrease.

山地雨林的总生物量远远大于10年生的西南桦人工林，其中灌木层的相对差别尤其巨大。94次的观测发现，人工林栽植后，土壤容重一般呈现一个先上升后下降的特点；而土壤非毛管孔隙度、土壤总孔隙度大多呈下降趋势，几年后有不同程度的恢复。

The reason may be that complex formed by rhodium and halide was difficult to produce the catalytic active species. Therefore halide ion was the poison for the rhodium catalyst in hydroformylation of olefins in ionic liquid. The effect of double long chain cationic surfactant (DCMAB, dicetyl dimethylammonium bromide) on selective hydrogenation of cinnmaldehyde catalyzed with RuCl3·x H2O/TPPTS was studied.

进一步的研究表明在使用有良好反应活性的两种催化剂HRh3 、Rh_2进行催化反应时，向体系中加入含有卤离子的化合物时将使反应活性大大降低，而且随着卤化物加入量的增加，催化剂的活性迅速下降，这是卤离子可能和金属铑作用使它难于生成催化活性物种，进一步证明卤素离子是引起催化剂活性下降的极其重要的因素。

The results show that with Cd2 + Stress Pistia stratiote large increase of the concentration of leaf tissue of the chlorophyll content decreased, while the MDA, soluble protein content, proline content, lipid membrane permeability, SOD, POD, CAT, nitrate reduction The first enzyme content was increased at different times and reached a peak after the downward trend.

结果显示，随着镉胁迫浓度的增加大薸叶组织内的叶绿素含量呈下降的趋势，而丙二醛、可溶性蛋白含量、脯氨酸含量、脂膜相对透性、超氧化物歧化酶、过氧化物酶、过氧化氢酶、硝酸还原酶的含量呈先升高并在不同的浓度达到高峰后再下降的趋势。

The result showed that the influence of temperature and RH on average price and rate of first class of flue-cured tobacco was similar, which showed a trend of parabola curve with temperature or RH increasing. The maximum value of average price occur at 38.0℃ and 87.0%, the maximum value of the rate of first class occur at 37.6℃ and 86.5%. The result also showed that when the temperature or RH was in the range of 37.5℃ to 38.0℃ or 85.0% to 88.0%, psychrometric difference was 1.5~2.0℃, the average price and rate of first class would exceed 10 yuan per kg and 40% respectively.

结果表明：变黄阶段不同温湿度组合对均价及上等烟率的影响基本相似，温度对二者的影响大于相对湿度；均价及上等烟率随温度或相对湿度的升高而均呈迅速上升→缓慢上升→缓慢下降→迅速下降的变化趋势，均价的峰值分别出现在38.0℃和87.0%，上等烟率的峰值分别出现在37.6℃和86.5%；此外研究结果还得出：当温度恒定在37.5℃~ 38.0℃，相对湿度恒定在85.0%~ 88.0%，干湿球差为1.5℃~ 2.0℃时，均价、上等烟率分别可达到10元/kg和40%以上。

Accordance with volume of biogas actually using requirement so that actualize supporting facilities, it can keep the pressure contant of biogas using for long time, the floating cover upside of body be pressurized, when the floating cover biogas digester fermenting to produce biogas will drive the soft PVC floating cover rising up with biogas storage, if user make use of biogas in case of biogas stove which the biogas pressure will be drop below in conjunction with floating cover will synchronous drop, when the floating cover has full of biogas which supernumerary of biogas automatic overflow to outside from bottom side of floating cover, it can not be appear with over high pressure thereby cause the tympanites of floating cove burst or biogas pipe burst and never has such phenomenon happen, the floating cove type biogas digester has reliable safe security.

根据沼气实际使用需求用量来做相应配置，可以保持长期在恒压状态沼气气压，浮罩顶部是密封的，当浮罩式沼气池发酵时所产生的沼气使浮罩上升并储存沼气，如果用户在用沼气炉灶用气时沼气压力将随之下降的同时浮罩也随着气压的下降而降低，当浮罩充满沼气时多余的沼气会自动从浮罩底部溢出，不会出现因气压过高造成鼓池、爆裂或爆管现象发生。浮罩式沼气池具有非常可靠的安全保障。

A cleaner includes a suction motor mounted in a cleaner main body, and generating a suction force; a filter for collecting dust or filth sucked by the suction force generated at the suction motor; a suction head connected with the filter by a suction tube, and sucking dust and filth on a floor; a brush installed in the suction head so as to ascend/descend in a vertical direction, and sweeping dust and foreign substances into the suction head; and a brush height control apparatus installed in the suction head, and making the brush ascend/descend in a vertical direction.

一种吸尘器，它包括安装在吸尘器主体内并且产生吸力的吸尘马达；收集由吸尘马达所产生的吸力吸入的尘土或污物的过滤器；通过吸尘管与过滤器连接的吸尘头，吸尘头吸入地板上的尘土和污物；安装在吸尘头内从而可以在垂直方向上上升/下降的刷子，它将尘土和异物扫入吸尘头；和刷子高度控制设备，它安装在吸尘头中，并且使刷子在垂直方向上上升/下降。

PH, temperature, amount and adding time of papain, autolysis duration could affect autolysis with external papain to some extent, and the optimum technology conditions were that papain was added by 10×10~4u per kg autolyzed solution at 6 hours after autolysis beginning, pH was adjusted to 6.0, then autolyzed at 55℃ for 26 hours. Suitable adding amount of yeast extract was 0.4 percent of autolyzed solution.

自溶过程中RNA的降解自溶过程中RNA降解的研究表明，在酵母自溶过程中，RNA降解率先缓慢增加，之后迅速上升，最后逐步趋于平衡；而上清液5'-GMP及5'-IMP总量则是先缓慢增加，迅速上升后则又开始下降；pH和温度对于RNA的降解有较大的影响：高压均质及NaCl的添加均能加速RNA的降解，提高上清液5'-GMP及5'-IMP总量，并且可提前上清液5'-GMP及5'-IMP总量开始下降的时间。3。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷