中柱

The differential equations of the system formed by a homogeneous cylinder and a non-fixed inner semicylindrical surface arc derived.

均质圆柱体或球体在固定半圆形柱面内的微振动问题常常出现在一些理论力学教材[1—3]中。

Most beam-column connections used in multi-story frames are semirigid joints.

半刚性连接是目前高层钢结构建筑中常用的一种梁柱连接形式。

Fig.6 Images reconstructed of the semispherical head phantom with and without a homogeneous "skull"approximate positions of perturbations, using a 29 mm diameter plaster rod as a perturbation and using a 16 mm diameter cylinder made of copper sheet as a perturbation.

图6扰动在半球形头模型中的大概位置；扰动目标为直径29 mm的石膏柱；扰动目标为直径16 mm铜管

Photo Gallery: Nebulae This dark column of cool molecular hydrogen gas and dust is part of the Eagle Nebula, a star-forming region 6,500 light-years away in the constellation Serpens.

意译：星云图片画廊。这个黑暗柱状物的清凉分子氢气和灰尘中的一部分――鹰星云，恒星形成区域， 6500光年之遥，在星座巨蛇座。

This dark column of cool molecular hydrogen gas and dust is part of the Eagle Nebula, a star-forming region 6,500 light-years away in the constellation Serpens.

意译：星云图片画廊。这个黑暗柱状物的清凉分子氢气和灰尘中的一部分――鹰星云，恒星形成区域， 6500光年之遥，在星座巨蛇座。

Isolation and purification of dihydroagarofuran sesquiterpene in Celastrus angulatus was preformed with normal-phase and reserve-phase high performance liquid chromatography and detected with TLC and HPLC.

为了优化苦皮藤中二氢沉香呋喃倍半萜类化合物分离纯化的方法，应用正相及反相高压制备柱层析相结合的方法进行分离纯化，以TLC及HPLC确定制备流动相条件并跟踪检测其分离效果。

Results show that the antibacterial component belongs to volatile oil、sesquiterpene、phenols and organic acids. The antibacterial part of the broth was isolated by silica gel column and 6 fractions of obviously antibacterial activity were obtained .By further study Fractions 1、2、3 contain sesquiterpene and fractions 8、9 contain phenols and fraction 10 contains phenolic organic acid.

对发酵液抑菌成分的研究表明，抑菌活性成分组成为挥发油倍半萜、酚和有机酸等类化合物，采用硅胶柱层析对发酵液抑菌活性部位进行分离实验，得到了6个具有明显抑菌活性的粗组分（组分1、2、3、8、9、10），其中组分1、2、3含有倍半萜类物质，组分8、9含有酚类物质，组分10中有含酚羟基的羧酸类物质。

Armed with a letter of introduction they visited Sir Martin Archer Shee, the President of the Royal Academy.

配备了一台的信中介绍，他们参观了主席先生，李柱铭阿彻书，主席的皇家学院。

The double～probe pulse echo method, combining the advantages of transmission technique and pulse reflection method, is used to optimize the ultrasonic echo signal amplitude in case of strong attenuation of energy when ultrasonic signal transmitting in solid rocket motor grain.

采用双探头脉冲反射法，综合了穿透法和脉冲反射法的优点，实现了超声信号在固体火箭发动机药柱中传播时能量强衰减的情况下超声回波信号幅值的最优化。

The separation and purification of pristinamycins from the fermentation broth by the method of silica gel column chromatography was developed.

建立了对发酵液中的普那霉素进行分离纯化的硅胶柱层析方法。

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％。