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At school, Rahul's physics teacher sets up an experiment to demonstrate sound waves in air.

在学校， Rahul 的物理学教师建立一个实验在空气里证

Also undertake complete sets of equipment, such as bar bundling machine, air-cooled line and so on.

同时也承接成套设备如棒材打捆机，风冷线等设备。

These bouncers are the big air-filled toys sets that they can enter into, jump around, and just be the kids that they really are.

这些城堡是大充气玩具套，他们可以进入，跳转周围，和仅仅是孩子们，他们真的。

At present, the annual output of 500,000 sets of Series Airbrush, strictly in accordance with the ISO9001-2000 quality system standards, with excellent hardware facilities, first-class production techniques, produced a first-class products.

目前年产各系列喷笔50万套，严格依照ISO9001-2000质量体系标准，以优良的硬件设施，一流的生产工艺和技术，生产出了一流的产品。

It contains a hull with an engine equipped on its back. An airscrew inside ducted is set on the airscrew. An air rudder locates on the tail of the hull and an apron sets on its lower part. The balance wing with tip plates is equipped on the tail of the hull.

它包括船体，在船体的后部安装有发动机，发动机的轴上安装有螺旋桨，螺旋桨罩在涵道内，船体的尾部设置有空气方向舵，船体的下部设置有围裙，它还包括设置有船体尾部的平衡翼，平衡翼上设置有翼尖端板。

Another area of study is size, which leads to the cardinal numbers and then to another conception of infinity: the aleph numbers , which allow meaningful comparison of the size of infinitely large sets.

另一项研究的领域是大小，这引起了基数，然后引起了无限的另一个概念：在阿莱夫数，使无限的大套的规模有意义的比较。

In chapter 4, the application of Rough Sets theory to algebra system-rings is studied.

第四章研究了粗糙集理论在代数系统——环上的应用。

In chapter 3, the application of Rough Sets theory to algebra system-groups is studied.

第三章研究了粗糙集理论在代数系统——群上的应用。

We also get a representation theorem for Bi-difference sets.2. Ideal and filter are two important concepts in quantum logic. From the order structure and algebraic structures of effect algebra, there are many definitions of ideals and filters.

理想和滤子是量子逻辑中的两个重要概念，由于量子逻辑有自身的代数结构和序结构，因此有多种意义下的理想和滤子概念。

In this paper, multivariate Lagrange interpolation problems are systemically discussed,and through amending Cramer Strange Proposition and proving interpolation theory, the geometry construction of the properly posed sets of nodes along the plane algebraic curve is studied, at the same time, a number of practical constructing methods are given.

本文系统阐述了多元Lagrange插值问题，通过修正Cramer奇论并用插值法加以证明，进一步对沿平面代数曲线插值唯一可解点组的几何结构进行深入的研究，同时得到了一些实用性较强的构造方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。