For various reasons, the spread of no-can-do limits has swept aside the optimism with which Americans met the initial challenges of the space age.
由于种种原因，“不可能”这种自限的蔓延，已将美国人迎接早期的太空挑战的乐观精神扫地出门。
A new map of 151 countries has revealed exactly which parts of the globe deliver long and happy lives for their citizens, within the environmental limits of the planet.
在全球环境的限制下，世界上151个国家哪里为市民提供的生活最为幸福长乐呢——就由这张地图来告诉你。
The noise limits for various types of motor vehicles have been reduced considerably, which has promoted application and development of noise abatement technology.
这显著促进了汽车降噪技术和测量分析技术不断的深入研究和应用。
The noise limits for various types of motor vehicles have been reduced considerably, which has promoted application and development of noise abatement technology.
这显著促进了汽车降噪技术和测量分析技术不断的深入研究和应用。
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