systems centre

All activities centre on five prime areas of environmental study: Understanding the Natural World, Air Pollution, Water Pollution, Solid Waste Reduction and Ecological Systems.

活动主要围绕五个生态环保范畴，包括认识大自然、空气污染、水质污染、减少固体废物和生态系统。

Beam riding systems use a target tracker whose purpose is to maintain the antenna boresight pointing at the centre of the reflecting area of the target.

波束制导系统使用一个目标跟踪装置，它的目的是保持天线视轴指向目标反射的中心。

Summarized: Succession development of sedimentary systems, structure controlling deposition centre, deposition space migration significantly, frequent changes of water depth.

总结为：沉积体系继承发展、沉积中心构造控制、沉积空间迁移明显、水体深度变化频繁。

Guest Business Centre Systems.

商务中心系统.

The motion centre of tethered satellite systems

论绳系卫星系统的运动中心