You could actually draw out a 36,000-kilometer strand or ribbon of nanotubes stronger than steel, but maybe a thousandth the thickness of a human hair.
2
今天上海市的常住人口中婴儿死亡率是千分之2.9,比纽约婴儿死亡率的千分之5.3要低许多。
That is well below the rate of 5.3 in New York City.
The number of miles traveled by American drivers in 2010 grew by 20.5 billion, or 0.7 percent, compared with 2009, according to the Federal Highway Administration.