第一象限

Any of the four areas into which a plane is divided by the reference axes in a Cartesian coordinate system, designated first, second, third, and fourth, counting counterclockwise from the area in which both coordinates are positive.

象限在笛卡尔坐标系中，被坐标轴分开的平面中的四个区域的任一个，命名为第一，第二，第三和第四，从此象限逆时针计算坐标为正数

During his first mission to the Alpha Quadrant , the Doctor was instrumental in establishing contact with Starfleet .

由於医生能被载入与星联建立起来的连接中，他被派去执行他在Alpha象限的第一个任务。

However, the difference between Hongge and Xinjie is also apparent, perhaps reflecting the source difference in the mantle. Relative to the Hongge intrusion the Xinjie intrusion is more depleted in Nd isotope ratio and enriched in REE and LILE. The Xinjie intrusion plots in the first quadrant in Sr-Nd diagram, which shows the Sr isotope-enriched and Nd isotope-depleted slightly feature. This indicates that the source of the Xinjie intrusion may had the mantle wedge signature.

但红格、新街岩体的源区又有所不同，新街岩体较红格岩体Nd同位素更亏损，稀土和大离子亲石元素更富集；新街岩体在Sr-Nd相关图上，位于第一象限，显示Sr同位素富集，Nd同位素略亏损特征，指示了新街岩体的源区可能有残留地幔楔的成分。

Replace the variable in the least common denominator by the solution to see if it is zero.

当k＞0时，函数的图象在第一、三象限内，曲线从左到右下降，也就是在每一个象限内y随x的增大而减小

Under the conditions that the concrete expression of its singularities are not sloved,we discuss the bounded property of trajectories, separatrix configuration,nonexistence and existence of limit cycle.

对一类多分子反应模型x＝1－αx－xpyq，y＝βy（xpyq－1－1）进行定性分析，在第一象限奇点无法具体求出的条件下，讨论了轨线的有界性，分界线的位置关系以及极限环的存在性和不存在

That means using the measure close degree of area vector between each cycles and the first cycle to express the coincidence...

即利用各周期与第一周期的面积向量的测度贴近度表示重合度，定量地描述各周期内轴心轨迹的重合情况；在此基础上提取了反应重合度整体离散度的标准差；利用象限面积向量信息熵进行综合的、定量的评价滑动轴承各个周期内轴心轨迹的总体分布均匀性。

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。