two point cross是什么意思

用法例句

The principle of three point method and its variation including two point method and four point method for roundness error separation was introduced.

论述了圆度误差分离的三点法及演化形式——二点法和四点法的基本原理 ,通过分析它们各自的特点和测量精度指出权函数的取值是影响测量精度的关键因素 ,应通过合理选择测量系统参数以避免谐波抑制的发生 ,而且应针对具体情况选择适当的圆度误差分离方

Effects of Tetranychus urticae Koch and Mechanical Damage on Volatile Infrochemicals of Tobacco;

机械损伤与二点叶螨取食对烟草挥发性信息化合物的影响

Effects of Tetranychus urticae Koch and Mechanical Damage on Volatile Infrochemicals of Solanum melongena;

机械损伤与二点叶螨取食对茄子挥发性信息化合物的影响

Influence of cyhalothrin and fenpropathrin on life-vigor and fecundity of Tetranychus urticae Koch;

三氟氯氰菊酯和甲氰菊酯对二点叶螨生命活力及繁殖力的影响

Impact of 3 plant extracts on the bioactivity of Tetranychus urticae;

3种植物对二点叶螨的生物活性

Study on Influence of Temperature to Life force and Fecundity in Tetranychus urticae;

温度对抗性二点叶螨种群生命力和繁殖力影响的研究

Epidemic dynamics of maize wallaby ear disease transmitted by Cicadulina bipunctella and assessment of maize damage;

玉米鼠耳病及其媒介昆虫二点叶蝉消长动态和玉米受害损失测定

Effects of six host plants on the development and fecundity of Cicadulina bipunctella;

六种寄主植物对二点叶蝉生长发育和繁殖的影响

Temporal and Spatial Dynamics of Cicadulina bipunctella Natural Populations;

二点叶蝉自然种群的时空动态

Its control effect on shoot borer and stalk borer were 93.

试验结果表明:5种农药防治螟虫,“毒杀”效果最佳,其对二点螟防治效果达93。

On the base of giving out the twelve-point circle, this article establishes the corresponding relations between twelve-point circle and circumcircle of a triangle, thereby strengthened the conclusions of the twelve-point circle.

　将三角形的九点圆扩充为十二点圆,并在此基础上,建立了它与三角形外接圆的关系,进一步扩充了十二点圆的结论。