查询词典 decrease in population

Soil erosion is one of the most important ecological environment problems in our country, which results in land resource destroy, soil degradation, land productivity decrease, water pollution, river and water storage works aggradation, flood, avalanche, mudrock flow and menace to the life and wealth of people, and so on.

土壤侵蚀问题是目前我国面临的主要生态环境问题之一，严重的水土流失不仅破坏土地资源、降低土壤肥力、制约粮食生产增长，还污染水环境、淤积河道和蓄水工程，导致洪水、崩塌和泥石流等灾害频繁发生、威胁人民的生命财产等。

And it has given the effects of the all factors on the runoff by 1D river networks mathematical model. Due to the natural and artificial influences, the water-sediment transport has greatly changed. It is characterized by marked decrease in runoff and sediment diverted from these outfalls and increase in water-sediment transport of main stream. The key factors causing these changes are aggradation of the three outfalls channels and Jingjiang river cutoff work.

结果表明，受自然因素和人为因素的影响，荆江－洞庭湖江湖水沙输移有了较大调整变化，主要表现为三口分流分沙大幅度减小，干流水沙输移增加；江湖关系变化的主要因素是三口分流道的淤积萎缩和荆江裁弯。

50Mmol/L NaCl stress had no influence on level of ATP in root of Ginkgo andAilanthus.Level of ATP in roots of Ginkgo,Ailanthus and Robinia decreased greatly under200mmol/L NaCl stress.The extent of decrease of ATP level accord to plant salt tolerance:Ginkgo is more salt tolerance,and ATP decreases more slowly than that of Ailanthus andRobinia.

11.50mmol/L的NaCl胁迫没有引起银杏和臭椿根尖ATP水平的明显改变；200mmol/L的NaCl胁迫引起银杏、刺槐和臭椿ATP水平指数性的衰减，ATP的下降幅度的变化与植物耐盐性一致：耐盐性强的银杏，ATP的下降幅度明显比刺槐和臭椿小。

Ginkgo is more drought tolerant,and maintain relatively higher Pn under drought;Robinia pseudoacacia is less drought tolerant,and Pn decrease greatly under stress;Ailanthus altissima is placed in the middle.

耐旱能力较强的银杏在干旱胁迫下维持较高的光合作用；刺槐的抗旱能力最弱，光合速率下降幅度最大，臭椿居中。

Moreover, the air flow-rate influences the cell temperature, and increasing the flow-rate makes the cell temperature decrease and poise.

另外，空气流速也会对电池的工作温度产生影响，流速越快，带走的热量就越多，电池的。总体温度就越低越均衡。

In order to decrease the vertical vibration of rolling stock, the air springs with variable damping oil dampers inside are developed.

为降低铁道车辆的垂向振动，开发了内置可变阻尼油压减振器空气弹簧。

Therefore, outlet air temperature tends to decrease as air mass flow rate increases.

因此，流出气流的温度呈现出随气流量的增加而降低的趋势。

A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.

稀薄化介质中密度和压力的下降，例如在空气中，由于声波的穿越而发生

It was possible in the cabinet to either decrease or increase the air pressure.

你能通过一扇小窗户观察实验对象在室内的反映。

The treadmill allows users to essentially decrease their weight via an air-pressure chamber that envelops the lower body and reduces a person's impact on the treadmill.

周一的时候他参加了湖人的训练课程，做了一些轻量的脚踏车运动，但是他预计还有一个月才能归队（骑脚踏车能够帮助运动员利用空气阻力减轻重量，从而在身体底部周围形成空气保护网，减少对运动员的伤害。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。