N-COUNT [美国英语] [num N, oft N 'of' n] →see tonne
Around 180,000 metric tons of food aid is required.
大约需要十八万公吨的食品援助。
Scientists, from Nature studied 20 years of satellite data of the world's 220,000 mountain glaciers, and found that since 2015, glaciers have last 298 billion metric tons off ice and snow per year.
《自然》杂志的科学家们研究了世界上22万座高山冰川20年来的卫星数据，发现自2015年以来，冰川上每年减少的冰雪总量为2980亿公吨。
One scientist estimated that if all the HeLa cells ever grown were gathered together, they would weigh more than fifty million metric tons.
VOA: special.2010.07.21
Now there are so many,experts say up to twenty metric tons a day could be removed with nets ver a period of several years.
VOA: special.2009.12.15
The solar-powered irrigation systems produced an average of nearly two metric tons of vegetables per month.
VOA: special.2010.01.11
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