the rate of gaseous products of denitrification

例句：

1. 1. The atmosphere is composed of a mixture of gases.
   大气是由各种气体组成的混合物。
2. 2. Gases are often used to make incandescent lamps.
   气体常被用来制造白炽灯。
3. 3.The scientist conducted experiments on the gaseous state of matter.
   这位科学家对物质的气态状态进行了实验。