这种作图法常被称为矢量相加的平行四边形法则.This construction is often called the parallelogram law of addition of vectors.赤平极射投影还要有其他的作图方法加以补充.The stereographic projection must be supplemented by other constructions.吉布斯提出用等边三角形作图, 这已成为三元体系的标...
She spends her Easter holidays taking groups of children to France.她带领一群孩子去法国过复活节。They've been living and working peacefully with members of various ethnic groups.他们和不同民族的人们一起和睦地生活和工作。Sixteen teams are taking part, ...
We operate six schools in three diverse regions of Colombia: Barranquilla , Quibd � � and Altos de Cazuc á.我们在哥伦比亚 巴兰吉拉 、 基布多、上卡祖卡(LosaltosdeCazuca)这三个不同的地区共建有六所学校....
The two principal combustion products are water vapor and carbon dioxide.两种主要的燃烧产物是水蒸气和二氧化碳。Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide.火星的大气层极其稀薄，几乎全部由二氧化碳构成。Carbon dioxide is a ne...