levering

Against a background of the worldwide shortage of energy and other natural resources, it would be like "levering the earth up" for China to keep her economic growth rate at 5% annually, considering her large size of population and shortage of natural resources.

在世界能源、矿产形势严峻的背景下，如果经济能以5%的速度持续增长，对人口众多、人均资源少的中国来说，也堪称完成了一件撬起地球的伟大事业。

Methods: On the basis of the fracture mechanism of zygomatic arch in cheekbone and anatomical characteristics, a diaplastic clasp was designed according to levering principle. Its mechanical properties was measured by mechanical testing.

方法：根据颧骨颧弓骨折机制和局部解剖特点，利用钩拉、撬拨杠杆原理设计复位器，通过力学试验测试其力学性能。

However, Chinese iron and steel enterprise is facing the challenges of entering WTO, levering speed of the increment of the world economy, quickly developing of other materials to substitute steel products.

但与此同时，世界经济发展速度放缓，钢材替代材料发展迅速，因而加入WTO后，中国钢铁企业面临着严峻挑战。