However, because LED its special optical and electrical properties, so that the accurate measurement and qualitydetermination for the researchers in different countries has brought great challenges.
然而，由于LED其特殊的光学和电学性能，使其在精确计量和品质测定给各国研究者带来了极大的挑战。
2
That excellence is not just the awesome energy of the best runners and the smoothness of the organisation, but also the quality of determination shown by all the competitors.
这种卓越不仅体现在最佳跑步者令人敬畏的能量和组织的流畅性上，也体现在所有参赛者所表现出的决心上。
3
The incident, which was disclosed only today, will raise fresh questions about the quality of care at Stafford hospital and the NHS's determination to improve patient safety.