种差异

For allopatric species, asymmetric ethological isolation was apparent in crosses between O. chinensis formosana and O. yezoensis: females of O . chinensis formosana readily accepted males of O. yezoensis, but females of O. yezoensis show reluctance to males of O. chinensis formosana; howe ver, in either reciprocal cross sperms were transferred.

分布不重叠的中华稻蝗台湾亚种与小翅稻蝗之间，小翅稻蝗的雌虫与中华稻蝗台湾亚种雄虫的交配率显著低于种内交配，反向交配时则和种内交配率无显著差异；正反交配都能完成精子传送，显示出不对称、不完全的行为隔离，而无机械隔离的存在。

Thirdly, we also examine the effect of these extracts on maize seed germination rate, maize seeding height and fresh weight, and the results show that three extracts are safe to maize at the concentration of 1:20, with a inhibit rate under 4 %.We further identified and purified organic acids, alkaloids hydroxybenzenes and neutral materials from extract and examined their effects on Amaranthus retroflexus L. seeds.

实验结果表明在干样：水为1：50以内，这三种向日葵的叶片提取液对反枝苋种子萌发和幼苗株高、鲜重及出叶数的抑制效果都非常显著；随着提取液浓度的下降抑制作用也呈明显的下降趋势；通过实验数据比较，这三种向日葵叶片提取液对反枝苋种子萌发抑制和对反枝苋幼苗株高、鲜重及出叶数的抑制效果略有差异。

The comparison of the effects on the two plants indicated that Ranunculusjaponicus, Aconitum sinomontanum,Ⅰ pomoea cairica, Aconitum gymnandrum and Anaphalis lactea showed significant effects on the two plants (their M values were separately -0.87,-0.82, 0.71,-0.68 and 0.62) and consequently these five plants were hopeful to be developed into new herbicides of plant origin.

综合比较对2种植物的综合化感效应指数差异，毛茛、高乌头、五爪金龙(Ⅰpomoea cairica)、露蕊乌头和乳白香青作用效果显著（其M差值分别是：-0.87、-0.82、-0.71、-0.68和-0.62），这5种植物有望开发新型植物源除草剂。

There were 22 pollinating insect species belonging to 4 orders and 11 families, among which, native bee species Megachile abluta, M. spissula, Xylocopa valga, Andrena parvula and Anthophora melanognatha were the main pollinators. M. abluta, M. spissula and X. valga were of uni-peak type with diurnal foraging activities trom 11:30 to 15:30, while A. parvula and A. melanognatha were of double-peak type with diurnal foraging activities on 9:30-11:30 and 16:30-18:30, indicating a complementary relationship among the pollinators. The main pollinators had significant differences in their tripping frequency and landing time, and their foraging behaviors were correlated with their body sizes.

结果表明：苜蓿访花昆虫共计22种，分别属于4个目，11个科，根据弹花效率初步确定鳞地蜂、黑颚条蜂、净切叶蜂、细切叶蜂和紫木蜂为河西地区主要传粉昆虫；主要传粉昆虫的日活动规律出现单峰型和双峰型2种，净切叶蜂、细切叶蜂和紫木蜂属于前者，只在11：30-15：30出现一个活动高峰，而鳞地蜂与黑颚条蜂则为双峰型，在9：30-11：30和16：30-18：30分别出现访花高峰，不同的传粉昆虫之间存在互补关系；主要传粉昆虫的弹花频率和小花停留时间存在显著差异，且访花行为与野生蜂体型紧密相关。

The comparison of most metal concentrations showes significant difference among interand intra-species, and T. taxirameum, E sinensis and B. argenteum accumulat greatly more than the others.

通过对苔藓种内和种间重金属含量的比较，研究发现苔藓植物对重金属的积累能力有显著性差异。

Evapotranspiration value and transpiration indexes of the three types of soil microbiotic crust under different water content(including Bryum argenteum crust,Didymodon nigrescens crust and algal crust) were measured.

通过对3种土壤生物结皮在对照和3个不同水分条件下进行蒸散量以及蒸腾指标的观测，结果表明：①3种土壤生物结皮蒸散量日变化过程呈现单峰型，各个处理间峰值出现时间和蒸散量变化幅度差异较大；真藓对照组峰值为0.473 g/10 cm2，出现时间为11：00时。

Phylogenetic analysis based on 5.8S/ITS sequence indicated Armillaria luteo-virens has a distant phylogenetic relationship with other genera of Tricholomataceae. Phylogenetic analysis based on two IGS-1 sequences indicated there were significant differences between the IGS-1 sequence of Armillaria luteo-virens and that of other species of Armillaria.

基于ITS的系统发育分析表明黄绿蜜环菌与口蘑科内其它属间物种的系统发育关系较远；基于IGS-1的系统发育分析表明黄绿蜜环菌与蜜环菌属内的其它种序列差异较大，系统发育关系较远，而与Lepiota属内的部分种具有较近的系统发育关系。

Phylogenetic analysis based on 5.8S/ITS sequence indicated Armillaria luteo-virens has a distant phylogenetic relationship with other genera of Tricholomataceae.

基于ITS的系统发育分析表明黄绿蜜环菌与口蘑科内其它属间物种的系统发育关系较远；基于IGS-1的系统发育分析表明黄绿蜜环菌与蜜环菌属内的其它种序列差异较大，系统发育关系较远，而与Lepiota属内的部分种具有较近的系统发育关系。

In this study, differences among tolerant capabilities of three species of nitrogen-fixation cyanobacteria (Anabaena azollae, Anabaena flos-aquae, Anabaena azotic) to two new sulfonylurea (Monosulfuron and Monosulfuron ester) were studied, which could be used to further explain the resistant mechanism to sulfonylurea herbicides and how these herbicides take effect.

本文以满江红鱼腥藻、固氮鱼腥藻及水华鱼腥藻为代表，利用环境毒理学的研究手段，通过研究3种固氮蓝藻对2种磺酰脲类除草剂---单嘧磺隆、单嘧磺酯的耐药性差异来揭示对磺酰脲类除草剂产生抗药性和耐药性的机理。

Three methods and 3 calculating formula were used to choose for concrete operation according to the idea at urine iodine assayed with cerous sulfate reducing reaction by which WHO and ICCIDD draw up the preventive and curative criteria of iodine deficiency.

本文根据&WHO与ICCIDD制定的碘缺乏病防治标准与方法&中硫酸铈还原反应测定尿碘的意图，采用3种方法和3种计算公式对具体操作进行选择，并对原标准对照计算法的不合理以及计算误差对评价尿碘水平的效能进行了探讨。结果表明：（1）方法Ⅰ存在仪器误差，准确度不佳。方法Ⅱ线性关系和准确度较理想，但操作不便计算麻烦。方法Ⅲ线性关系和准确度与方法Ⅱ无差异，操作和计算简便、节约试剂。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！