正的

Clear Aligner Treatment : iROK System, the leading edge Clear Aligner Treatment system with the best clinical efficacy.

无托槽隐形矫治器：iROK隐形正畸系统，最先进的无托槽隐形正畸技术，最佳的临床疗效。

Carbon distribution and content of normal alkane and isoalkane in rubber waxes are measured by using high temperature gas chromatography.

采用高温气相色谱法测定橡胶防护蜡中的正构烷烃和非正构烷烃的碳数及含量。

Objective To assess the importance of overrefraction in the soft contact lens fitting of patients with higher ametropia or moderate to higher astigmatism.

目的探讨戴片验光在高度屈光不正或中、高度散光的屈光不正患者软性角膜接触镜验配中的意义。

Taking the spring of coupled pendulum s as an uniform elastic rod, characteristic equations are derived for symmetric normal mode and antisymmetric modes.

将耦合摆弹簧作为弹性均匀杆，导出了对称简正模与反对称简正模的本征方程，给出各角频率值的近似式，并进行了讨论

The regional geology and ore-forming condition in the Hongyang area, Zhenping are simply introduced. Alkaline rocks in the area are mainly composed of gray-black trachyte, and some breccia lava, syenite porphyry and syenite aplite.

中文摘要：文章介绍了镇坪洪阳地区的区域地质概况和成矿地质条件；碱性岩的岩性组合主要以灰黑色粗面岩为主、并含有角砾熔岩，正长斑岩、正长细晶岩等。

Then, we use the pattern method to represent the cube projection on Platonic solids, Archimedean solids and Catalan solids, and observe their dynamic variations.

在第二章至第五章，我们用切割的方法做出正立方体在正多面体、阿基米德多面体、卡塔兰多面体上的投影，并观察其动态变化。

But they are learning that the safest way to become president and to remain president is to be elected—a lesson Mrs Arroyo is teaching them.

但是，他们正学习阿罗约总统正授教给自己的一个教训：当选总统和保住总统的最安全途径是通过选举当选总统。

We shall use algebraic methods to study graphs which are highly regular although this regularity is not expressed in terms of the automorphism group.

我们将用代数方法来研究高度正则的图，尽管这种正则性不是用自同构群来表达的。

In this paper,we calculate average deviation s and give two kinds of estimate of standard deviation for the normal population.

求出了正态分布的平均偏差，并由此给出了正态总体标准差的两种新估计。

Chad, my friend＇s son, was at that awkward age－－old enough for his first date, but too young to drive.

我朋友的儿子夏德正处于一个尴尬的年龄———第一次约会正合适，可自己开车又太年轻。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！