The necessary condition of external oscillations is the existence of closed geodesic lines on the surface of scatterers.
外部振荡存在的必要条件是散射体表面有闭合测地线。
Distributions of monthly sea surface temperature (SST) anomaly field over the equatorial Pacific and the northern Pacific have short-term climatic oscillations in the past 40 years.
近40年赤道太平洋和北太平洋月平均海温距平场分布存在着短期气候振动，分析表明，它对大气环流有一定的影响。
Various complex unsteady states were observed by the comparison of the catalyst surface temperature oscillations with the CO_2 concentration oscillations in products.
通过对比催化剂表面的温度振荡和产物中CO_2的浓度振荡观察到各种复杂的非稳态过程，加深了对产生化学振荡的机理认识。
Various complex unsteady states were observed by the comparison of the catalyst surface temperature oscillations with the CO_2 concentration oscillations in products.
通过对比催化剂表面的温度振荡和产物中CO_2的浓度振荡观察到各种复杂的非稳态过程，加深了对产生化学振荡的机理认识。
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