A symplectic integrator is viewed as promise of being a valuable tool in the numerical exploration of planetary and satellite n-body systems in the solar system dynamics.

在太阳系动力学中，辛积分器已成为研究哈密顿系统的长期定性演化的最佳工具。

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He said the U. N. Security Council sanctions, approved in June, make clear that the application international law with regard to Iran is not an empty promise.

他说，联合国安理会在六月份批准的对伊朗的制裁，表明对伊朗实施国际法律并不是一席空谈。

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Meanwhile, legislation is being prepared by Senator Jim Inhofe that would, importantly, condition U.S. contributions to the U.N. on a U.N. promise not to pursue international taxation schemes.

CENTERFORSECURITYPOLICY: U.S. narrowly avoids "globotaxes" -- this time

That's the promise from Westbury, N.

FORBES: Look, Ma, no glasses!

However, in order to realize the promise of this revolutionary capability, the Navy must fully fund the N-UCAS Carrier Demonstration and Technology Maturation programs from today through their conclusion in 2013.

CENTERFORSECURITYPOLICY: Where are the carriers?