天体力学

It provides not only fundamental principle and analysis of Modern Applied Mechanics and Dynamics but also applications in research areas such as stability, rigid body and rigid-body systems, movements of celestial body and spacecraft, vibration, nonlinear dynamics, et al.

它的研究一方面提供了现代应用力学以及动力学一般理论最基本的原理和方法，另一方面，它本身也给出了在稳定性、刚体与刚体系、天体与宇航器的运动、振动、非线性动力学等领域中一系列有实用价值的成果。

In this context, the research and instruction of mathematics—which, as established by Christophorus Clavius, teacher of Matteo Ricci, included geography and cartography—constituted a process of spiritual elevation, a journey toward salvation.

在耶稣会士于1551年建立的罗马学院中，来自整个欧洲的学生除了学习神学以外，还接受着高强度的学术培训，学习修辞学、记忆法、哲学，以及数学，包括算术、几何、透视、宇宙学、地球体学、天文制表、天体观测学（后四者可称作 sphaera ），还要学习计时学、音乐、力学、水文地理学和建筑学。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。