单种的

From Apr.1st to Oct. ninth, when two-year-old Onobrychis viciaefolia 、one-year-old Onobrychis viciaefolia 、Triticum 、Triticum aestivum/ Vicia villosa 、Triticum aestivum/ Brassica campertris 、Triticum aestivum-Vicia villosa and Triticum aestivum-Brassica campertris are planted, their content of soluble salt in 0～20cm soil layer are lower than that in uncovered soil, in the period of harvest , they decrease 0.361%、0.331%、0.141%、0.327%、0.312% and 0.317% respectively.

从时间变化分析，采用二年生红豆草、一年生红豆草、单作小麦、小麦/毛苕子、小麦/油菜、小麦-毛苕子和小麦-油菜7 种绿色覆盖模式时均使土壤表层盐分含量比同期裸地的低，生育期末分别降低了0.361%、0.331%、0.141%、0.327%、0.312%、0.321%和0.317%。

It is apparent that the Mesocyprinus group consisting of five species is a polyphyletic group.

由5种中鲤组成的中鲤亚属明显不构成一个单系群。

Pseudomonas is an important bacteria that caused spoilage of proteinaceous foods.

假单胞菌是一种导致蛋白类食品腐败的重要腐败细菌。

The effect of sodium pyrophosphate ,glycerol monostearate and starch acetate on rheological propertiesof rice starch were studied by Dynamic Rheometry.

采用动态流变仪对米线生产中三种常用添加剂焦磷酸钠、单甘酯和淀粉醋酸酯对大米淀粉流变特性的影响进行了研究。

A new travelling light modulator using single ridged waveguide as microwave circuit is designed.

设计了一种采用单脊波导作为微波电路的新型行波光调制器。

Key factors influencing urban agglomeration highway transport network system are sought out by using systematic structure model analysis method. Three hierarchies of urban agglomeration highway transport network are abstracted such as metropolitan district, inter city and external highway transport. Four kinds of structure morphology such as network of ringy and radial road surrounding one central city, decentralized network with multiple central cities, zonal and stretchy network, and combined network are studied out.

采用系统结构模型分析法寻找影响城市群公路交通网络系统的关键因素；提炼出城市群公路交通网络市域、城际、对外交通三个层次系统；拟定了单中心环放式、多中心分散式、带状伸长式、组合型四种城市群公路交通网络结构形态。

Results There were 3 types of vessel elements,scalariform vessel,reticulated vessel and pitted vessel,the perforation plates were simple perforation plate.

结果茵陈蒿具有梯纹、网纹和孔纹3种类型的导管，穿孔板类型为单穿孔。

Chinese scientists have developed a method to separate mixtures of metallic and semiconducting single-walled carbon nanotubes by a two-step dispersion-centrifugation process.

我国科学家已经开发出一种方法，独立的混合金属和半导体单壁碳纳米管由两步分散离心过程。

Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.

论文以激光纵模的分裂理论为基础，提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd：YAG激光器的总体方案，并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析；设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具；建立了两种不同功率激光二极管端面泵浦的Nd：YAG激光实验系统，并对液晶盒的透射性质进行了测试；将未灌注液晶的空液晶F-P摘要标准具插入大功率LD泵浦Nd：、叭G激光谐振腔内，观察到了单纵模激光输出，说明所设计和加工的液晶F一P标准具具有纵模选择能力；将镀有增透膜的液晶盒插入大功率LD泵浦Nd八7AG激光谐振腔内，是否产生了激光纵模分裂现象还难以确定。

The narrowed, stalklike basal part of certain petals or sepals.

北美洲的一种兰花，叶单生，花具有丝状反析花瓣。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。