Task: Translation
Input (Chinese): 1975年，珠峰被测量的高度为8848米，与之前的计算结果一致，但1999年一个美国调查小组测量的高度为8850米。
Output (English): In 1975 the peak was surveyed at a height of 8 848 metres, in line with previous calculations, but a U.S. survey team in 1999 measured it at 8 850m.