时段

Significant difference between negative and neutral emotion waves was observed in 5 time periods in the right occipital region (120-140 ms), central frontoparietal region (220-240 ms), central parietal region (280-300 ms), left parietal and right temporopartial regions (320-340 ms) and frontopartial occipitotemporal region (480-500 ms).

负性与中性表情的差异分别于5个时段相继出现在不同的头皮区域：右枕区(120~140ms)，中央额顶区(220~240ms)，中央顶区(280~300ms)，左顶和右额颞区(320~340ms)和额顶枕颞区(480~500ms)。

More ERP gantries are being installed, for longer hours, and some at higher prices too.

政府增设更多的公路电子收费闸门，延长了收费时段和调高过路收费。

Therefore, a experimentent with three exposure types (early cleavage exposure, 0hpf; gastrula exposure, 8hpf and 0hpf exposure but stop after 8 hours, 8h stop) were designed to investigate the toxicity and bioaccumulation of bisphenol A in zebrafish embryo in different stages.

为研究胚胎在不同发育阶段对外源化合物的毒性敏感差异，以0hpf、8hpf和8h终止3种暴露方式进行染毒，探讨斑马鱼胚胎在不同暴露时段对双酚A毒性和生物蓄积特征。

Therefore, a experimentent with three exposure types (early cleavage exposure, 0hpf; gastrula exposure, 8hpf and 0hpf exposure but stop after 8 hours, 8h stop) were designed to investigate the toxicity and bioaccumulation of bisphenol A in zebrafish embryo in different stages.

为研究胚胎在不同发育阶段对外源化合物的毒性敏感差异，以0hpf、8hpf和8h终止3种暴露方式进行染毒，探讨斑马鱼胚胎在不同暴露时段对双酚A。

Populus alba × berolinensis, Salix babylonica and Quercus mongolica mainly emitted isoprene; Pinus tabulaeformis mainly emitted α-pinene; Ulmus pumila, Gleditsia japonica and Syringa oblate mainly emitted limonene; Ligustrum obtusifolium mainly emitted isoprene, limonene and α-pinene at different time. The highest emission rates were observed for Populus alba × berolinensis and Salix babylonica.

不同树种排放的BVOCs组成明显不同，银中杨、垂柳和蒙古栎以排放异戊二烯为主；油松主要释放α－蒎烯；榆树、皂角和丁香以释放柠檬烯为主；水腊在不同时段其BVOCs组成情况变化较大，主要释放异戊二烯、柠檬烯和α－蒎烯；其中银中杨和垂柳的BVOCs释放量明显高于其它树种。

The gypseous salt is taken as linear Maxwell flows,and a viscous and elastic mechanics model for plane strain features is established.

将盐膏层作为线性Maxwell流体，建立了平面应变问题的粘弹性力学模型，实测了江汉油田王 80 3井不同时段内的井径变化。

The most serious desertification occurred in southeast of MuSu Desert,then appeared inferior degree in midst,north,south and east,anddegression degree in other directions.6.The changes of environment in Mu Su Desert in historical times havebeen controlled by climatic changes in temperature and drought-wetwithin hundreds or thousands years.At present,it came into being suchspatial structure and environmental characteristics fordesertification land because of being relative to other naturalgeographic characters and human activities.In all that,physiognomyand hiemal wind are the driving factors.The sandy matter in stratumis the physical fountain factor.The depravation of surface water inthis region is one of representations of environmental changes, meanwhile,it is also the factor which leads to the degradation ofvegetation and desertification.On the whole,human activity has actedupon these natural elements,becoming a dominant factor in the regionalenvironment changes since Ming and Qing dynasty.7.Influencing of human activities on the environment of Mu Su Deserthad occurred before Qin dynasty,and its intensity of earlier influencewas so slight that it could not cause a large scope and long timeenvironmental changes.

沙漠化的程度是东南部最强，中北部、南部和东部次之，而后向其他方向递减。6、毛乌素沙地历史时期的环境变化是受百年乃至千年尺度的气候冷暖、干湿变化控制的，之所以形成目前这样的沙漠化土地空间分布格局和环境特征，则与其地的自然地理特征和人类活动有密切关系，其中地貌及冬季风是动力因素；地层中的沙物质是物源因素；地表水环境恶化是区域环境变化的表现之一，同时又是植被退化和沙漠化的引致因素；人类活动总体上是叠加在自然因素之上的，只是明清以来在局地环境变化中成为主导因素。7、毛乌素沙地人类活动的环境影响在先秦时期就已出现，早期的影响程度是轻微的，不足以造成大范围、长时段的环境变化。

Ministry of Education issued "Secondary Hortation Law of Media Production and broadcast of Lifelong Education Programs" in 2003, and jointly issued two branch laws with News Bureau of "Methods of electronic media offering channels for lifelong learning programs at fixed hours" in the same year.

教育部乃於2003年订颁「媒体制作刊播终身学习节目或内容补助奖励法」，并与新闻局於2003年会衔发布「电子媒体提供时段频道播放终身学习节目办法」等两项子法。

In the fast sorption stage （before 48 h）, there was an up-to-down fluctuation of phenanthrene sorption ratio （sorption amount/added amount） in humic acid fraction, possibly due to surface sorption by minerals and competitive sorption by humin fraction.

在快吸附至转折点阶段，胡敏酸组分中菲的吸附比例出现先升后降的波动，可归因于初始时段矿物表面吸附、胡敏素竞争吸附的影响。

Methods The inhibitory effects of psoralen on the viability of MCF-7/ADR cells were determined with MTT assay, intracellular adriamycin concentration was assayed with HPLC and the intracellular Ca2+ concentrations in different incubative duration were detected with confocal microscope.

采用MTT法测定补骨脂素对细胞增殖抑制作用，高效液相色谱法检测细胞内ADR的浓度，激光共聚焦显微镜测定细胞内不同时段的Ca2+浓度。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。