1·A colorless gas that is present in the air in trace amounts.
空气中存在的无色微量气体。
2·Sucrose content was present at trace amounts in most cultivars.
在大多数品种果实中，蔗糖含量微量。
3·This element occurs naturally in trace amounts in the environment.
这自然会出现的微量元素在环境中的数额。
4·Certain other elements are needed in trace amounts for cell metabolism.
细胞的新陈代谢还需某些其它的微量元素。
5·You don't have to worry, we're definitely talking about trace, trace amounts.
但你不必担心，我们所说的绝对是非常，非常微量的。
6·In normal coal samples, quartz and other minerals are found only in trace amounts.
在一般的煤的样板中，石英和其他矿物质的含量是相当低的。
7·They occur in such trace amounts in natural, or "whole," coal that they aren't a problem.
它们在天然煤(或称“全”煤)中仅以痕量存在，并不构成问题。
8·Both the FDA and health Canada state that those trace amounts pose negligible health risks.
不论食品及药物管理局还是加拿大的卫生部，都认为二恶英少到可以忽略的地步。
9·Trace amounts of radiation from Japan have been detected across the United States and Europe.
从日本到达美国及欧洲的辐射量及其微弱。
10·Now, the company admits that the epoxy liners in its bottles used to contain trace amounts of BPA.
现在，公司承认在它的这个水壶里面的环氧衬里里面曾经含有微量的BPA。