Trace amounts

• 痕量

Trace amounts的用法和样例：

例句

1. The regularity of random error of trace element analysis is discussed.
   本文讨论了痕量元素分析中随机误差的规律性。
2. As a safety measure, it is mixed with trace amounts of an odorant to allow its detection.
   作为一种安全措施，在甲烷中掺入痕量的有味气体以便辨识。