closed-orbits

常见例句

Some sufficient condition to guarantee the existence of global invariant manifolds consisting zero homotopic closed orbits is gived.
同时给出了这类系统存在由第一类（零伦）闭轨组成的全局不变流形的条件。
Perhaps, the most famous one is the Comet Halley, it has a closed orbit with a period of 76 years.
最出名的封闭式轨道彗星当然是以76年的周期绕日运行的哈雷彗星。
By using the closed orbit theory, the photodetachment cross section of H- near a metal surface is derived and calculated.
利用闭合轨道理论，我们推导和计算了H-在金属面附近的光剥离截面。
Unlike the case of the photodetachment of H- near an elastic interface, the length of the closed orbit does not equal the twice distance between the ion and the surface.
傅立叶变换截面中的每一条共振峰正好和电子的一条闭合轨道相对应。
The period, action, and length of the detached electron’s closed orbit are nearly the same as the case of the photodetachment of H- near an elastic interface.
因此可以用弹性截面模拟金属面。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之,如果恒星很小,维持生命的行星就要在离恒星很近的轨道上运行,而且要有极好的条件才能使生命得以发展