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And it is of vital importance to enlarge the breadth of labor utilities, increase yield of crops per unit and highlight diversified production so as to implement a more rational disposition of available resources and sustainable development in rural povertystricken areas of Hainan Province.

但是贫困和返贫困现象依然存在，而且这些难以脱贫和容易返贫的农户多分布在山区，所处的自然、经济和社会环境恶劣，综合经济实力低，因此今后的贫困地区农村经济发展及环境资源保护的扶贫开发工作将更加艰巨。

This study was conducted to investigate the mechanism of biogas yield improvement of the pretreated rice straw.

方文杰 北京化工大学环境科学与工程系，北京 100029康佳丽北京化工大学环境科学与工程系，北京 100029

The reaction temperature had a greater effect on amino acid yield in the hydrolysate than reaction pressure and reaction time.

水解产物中不同种类氨基酸的产率随反应温度、反应压力和反应时间的变化规律各不相同。

Winter wheat varieties were used as materials, their coleoptile length, seedling length and main radicle length of wheat seedlings were investigated under different concentrations of PEG-6000 osmotic solution simulated drought stress, and their relations with the yield components and drought tolerance under rainfed and rainout shelters were further analyzed.

以6个抗旱性不同的冬小麦品种为材料，通过不同浓度的PEC-6000渗透溶液模拟干旱胁迫处理，研究了小麦苗期的胚芽鞘长度、苗高、主胚根长等性状，并与其在大田及防雨棚控水条件下的产量构成和抗旱性的关系进行分析。

An optimal yield of 72% was achieved when the reaction was carried out in refluxing.

冰乙酸既是反应溶剂，又是催化剂，产率最高可达72%。

The inclusion body of IFN-BLA was denatured and refolded by dialysis and purified by ion-exchange chromatography. The overall yield of IFN-BLA was about 45 mg/L with purity higher than 90%.

对包涵体的复性条件进行了摸索，建立了IFN-BLA的复性及纯化方法，纯化后的蛋白产量约为45 mg/L，纯度在90％以上。

In terms of the yield of organic distillate and the formation rate of coke, the results show that reused catalytic activity changes moderately during the first 3 times of regeneration, while the reused catalyst is gradually deactivated after repeated regenerations more than 3 times.

此外还对催化剂HZSM-5采用在空气中600℃焙烧的方式再生以及再生次数对产物量和催化活性的影响进行了研究，结果表明：再生前三次，催化剂活性变化不大，随着再生次数的增加，催化剂活性受到影响程度也增大。

These cylinders are protected by Type CG-3 fusible metal plug s with a nominal yield temperature of 212 F.

用标称变形温度212°F的CG-3型易熔金属塞保护这些钢瓶。

These cylinders are protected by Type CG-3 fusible metal plugs with a nominal yield temperature of 212 F.

用标称变形温度212°F的CG-3型易熔金属塞保护这些钢瓶。

These cylinders are protected by Type CG-3 fusible metal plugs witha nominal yield temperature of 212°F.

用标称变形温度212°F的CG-3型易熔金属塞保护这些钢瓶。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。