odorant造句怎么写

"The chief source of methane is natural gas, but it can also be produced from coal. Abundant, cheap, and clean, methane is used widely as a fuel in homes, commercial establishments, and factories; as a safety measure, it is mixed with trace amounts of an odorant to allow its detection."

In this paper, the gene of general odorant binding protein 2 in the antenna of Helicoverpa assulta (Guen?)was cloned and expressed in Escherichia coli.

(2) sorption of odorant molecules into the mucus at the air mucus interface;

An engineered egg is placed in a voltage clamp system and an odorant is dissolved in the buffer solution in which the egg is floating.