There is nothing in this world constant, but in constancy.& Jonathan Swift

The reason so few marriages are happy is that young ladies spend their time in making nets, not making cages.& Jonathan Swift

美满婚姻之所以如此少，是少女们把她们的时间用于编网，而不用于制作笼子。&斯威夫特

Knowledge related to vibration monitoring of rotating machine is also mentioned in this article.

文中还简述了旋转机械振动监测的有关知识.

The rotor dynamics design is the important step in designing rotating machine.

转子动力学设计是旋转机械设计中的重要环节.

History and Present of the Luminous Environment in Domestic Museums& Taking the National Art Gallery as Example

我国博物馆光环境之历史与现状&以中国国家美术馆为例

Is there a shortcut I can take to the national art gallery?

请问去美国美术馆有近路吗？

Fountain in front of National Art Gallery.

国家医术馆前的喷泉

An Xue ( Curator of the Academic Department of National Art Gallery): I will talk about something from the perspective of knowledge and accountability.

安雪（中国美术馆学术部、策展人）：我从知识性和责任性的角度来谈谈。

He has held several personal painting exhibitions in the National Chinese Art Gallery in Beijing, in Xi'an and other places.

曾在北京中国美术馆及西安等地多次举办个人画展。

And if you are interested in art, you should visit the national art gallery. It has a famous collection of Italian paintings.

如果你们对艺术感兴趣，可以去参观一下国家美术馆，那儿收藏的意大利油画很有名。

This machine cannon has a high rotating speed reaching 500 revolutions a minute.

这架机关炮的转速很高,每分钟可达到500转.

Taking account of motor rotating speed fluctuations, a system equivalent mechanical model is established.

考虑电动机转速的波动, 建立了系统的等效驱动力学模型.

It has practical value to the parameter selections of resistance and rotating speed in series.

对串联风机系统中阻力层及风机转速的参数选择具有一定的参考价值.

Optimum position of sprinkling aperture and formula of rotating speed are derived.

推导出了最佳开孔位置和转速的计算式.

National interest is the inherent deciding factor of foreign behavior of a modern nation state.

国家利益是现代民族国家对外行为的内在决定性因素.

It is too early to predict the demise of the nation state.

现在预测政府的灭亡还为时尚早.

Ireland is today the only Celtic nation state left the world.

在今天的世界上,克尔特民族的国家只剩下爱尔兰一个了.

The nation-state forming process is the battle power of Christianity and the royal power . 3.

民族国家的形成过程就是教权与王权争斗的过程.

That every newly created nation state will adapt.

每个新独立的民族国家都将适应这个环境.

Walk along the road and turn right at the traffic lights.

沿着这条路走,在交通灯处向右转.

" I've got to go back too. I'll walk along with you. "

“ 我也要回去, 我跟你们一路走. ”