小于

There was a low accumulation of Pb in Pelargonium horlarum. When the Pb concentration in soil was increased by 1500 mg/kg, the Pb was accumulated by 169.5 mg/kg only. The plant content of Pb was lower than the hyperaccumulator critical content. The shoot' accumulation of Pb was significantly higher than that of root.

随着土壤中铅浓度增加，与对照相比，生物量在铅浓度增加1000 mg/kg时，才有显著下降；但对铅的吸收量较低，当土壤中铅浓度增加1500 mg/kg时仅吸收169.5 mg/kg；地上部分吸收量远小于地下部分的吸收量，转移系数小于0.5。

A simulation model was set up. Simulation outcome shows that compensating torque can be rapidly regulated according to demands of dynamic loading.Stable-state error is less than one percent,and dynamic error is much more less than that of traditional PID.In the

建立了仿真实验模型，运行结果表明：补偿转矩能够根据动态加载的要求进行快速调整；稳态运行速度误差小于1%，动态误差远远小于传统PID控制。

In the best condition of headspace and chromatogram, the mensuration of aquatic trace volatile can get a satisfaction result such as chloroform , carbon tetrachloride , trichloroethylene and perchlorethylene, all relativity standard deviation RSD is less than 4%,all the correlation coefficient R is larger than 0.99, and the relative error is less than 3%.

在选择最佳的顶空和色谱条件下，测定水中痕量挥发物三氯甲烷，四氯化碳，三氯乙烯和四氯乙烯可获得令人满意的结果，相对标准偏差RSD均小于4%，相关系数R均大于0.99，相对误差小于3%。

According to three compared experiments, which are using simple tactile guide, with visual guide and with tactile board, we conclude that the simulated phosphene positioning system with tactile board is accurate (the mean error is less than 10mm) and reproducible (the standard deviation is less than 6mm) in evaluating simulated phosphene.

如此循环往复，在经过简单触觉导航、加入视觉导航和具有触摸板导航的三个对照性实验后，我们得出具有触摸板导航的模拟光幻视定位系统能够精确(平均误差小于10mm)且稳定(标准差小于6mm)的对模拟光幻视点进行定位。

The results showed that the workability of PGM with 13% water content was better, the mechanics indexeal of PGM decreased with the increment of water, and increased with the enhancement of pisolite when the amount of water less than 14% and pisolite less than 35%, moreover, tensile strength of PGM was approximately 40% higher than that of ordinary concrete.

研究表明，对于所研究的豆石型灌浆料，其在13%加水量下具有较好的工作性能；其力学指标随加水量的增大而降低；当加水量小于14%，豆石含量小于35%时，力学指标随豆石掺量的增大而提高。此外，研究还发现，豆石型灌浆料的抗拉强度要比同等级的普通混凝土高40%左右。

B. preprandial blood glucose concentrations below 90 mg/dl and one-hour postprandial concentrations below 120 mg/dl minimize the incidence of macrosomia.

餐前血糖浓度小于90 mg/dl，餐后一小时浓度小于120 mg/dl使巨大儿的发生率降到最低。

B. Preprandial blood glucose concentrations below 90 mg/dL andone-hour postprandial concentrations below 120 mg/dL minimize theincidence of macrosomia.

餐前血糖浓度小于90 mg/dL，餐后一小时浓度小于120 mg/dL使巨大儿的发生率降到最低。

Dairy production enterprises must be pasteurized milk and ultra-high temperature sterilized milk packaging product names next to the location, with not less than products the name of the font size and height of not less than one-fifth of the principal display surface height, respectively, marking the Chinese character "fresh milk / milk" and "pure milk / milk."

乳制品生产企业必须在巴氏杀菌乳和超高温灭菌乳包装上紧邻产品名称的位置，用不小于产品名称字号且字体高度不小于主要展示面高度五分之一的汉字分别标注"鲜牛奶／乳"和"纯牛奶／乳"。

In view of the principle of pointbypoint comparison method, the foundation deciding whether the middle point interpolation is the control step error of NC system has been advanced, the math mould of inserting and compensation method established and the function that judges error by interpolating method has been improved.

基于逐点比较法原理，提出中点插补算法作为数控系统控制步进的偏差判别依据，建立了插补算法的数学模型，对插补算法偏差判别函数进行了改进和完善。实例分析结果表明，中点插补算法使插补精度由原来的小于等于一个脉冲当量提高到小于等于 0 。5个脉冲当量，插补点大幅度地下降，系统的响应速度加快和插补精度提高

For optimization parameters in structure and motion,the experimental method for the five-factor quadratics rotary orthogonal combination was adopted,and two evaluation indexes(mixing homogeneity and material powder) were applied in the experiment.

为了优化其结构与运动参数，采用二次回归正交旋转组合试验设计对5个试验因素进行了混合均匀度及物料细粉率作为指标的试验研究，得出了其结构与运动参数的合理组合，即揉搓转子转速宜取40~50 r/m in、剪切转子转速宜取55~65 r/m in，转子间隙宜取11~13 mm，齿杆角度宜取5~°10，°混合时间宜小于10 m in，充满系数不应小于0.1。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。