片语

millionth第一百万的；百万分之一的

英汉例句

• in 2006, the fda established a lead limit of 0.1 parts per million (ppm) in candy, based on the level the agency believed to be the lowest achievable.

  2006年，fda对糖果中铅的含量上限设定为百万分之0.1，基于这个标準的基础上这个机构相信这是最低含量。

• by 2008, the level of co2; in the tub was 385 parts per million (ppm) and rising by 2 or 3 ppm each year.

  2008年时，地球大气中的二氧化碳浓度是385ppm.(ppm为浓度单位，即表示百万分之(几)，或称百万分率)，并以2—3ppm/年的速度上升。

• measurements made since the 1950s show the level of carbon dioxide rising year on year, from 316 parts per million (ppm) in 1959 to 387ppm in 2009.

  从五十年代开始的测量数据显示，大气中的二氧化碳浓度在逐年增高，从1959年的316百万分率（ppm）增加到2009年的387百万分率。

• however, none of the melamine concentrations in the eggs exceeded the fda's maximum allowable level -- 2.5 parts per million (ppm) in foods.

  然而，所产鸡蛋中的三聚氰胺含量都没有超过美国食品与药物管理局设置的最高允许水平——食品中含2.5ppm的三聚氰胺。

• hitherto diesel contained up to 500 parts per million (ppm) of sulphur, but the new rules limit sulphur to 15 ppm.

  目前，柴油中硫含量为500ppm，但新规定将其限制在15ppm。

• one group ate food with 0.3 parts per million (ppm) methylmercury, which most u.

  第一组吃的食物中，甲基水银含量是千万分之三。

• uranium is usually extracted from ore that contains 1, 000 or more parts per million (ppm) of the element.

  铀通常是从铀含量在百万分之一千以上（1000ppm）的铀矿中提炼出来。

• all the methods give the same result: the concentration of oxygen is declining everywhere at the same rate, about 20 parts per million (ppm) per year.

  所有这些方法都得到了同样的结论：地球上所有地方的含氧量正在以同样的速度（大约每年0.002%）减少。

• al gore called for a new global goal of limiting co2 levels to 350 parts per million (ppm) - current levels are already over 380ppm, up from 280ppm before the industrial revolution.

  戈尔呼吁建立一个新的全球目标限制二氧化碳排放量为350ppm-目前的水平已经超过380ppm，远远高于工业革命前的280ppm。