When someone had been exposed to valericacid, for example, he tended to react negatively to a face.
比如某人闻到缬草酸时，他对看到的脸就会有不好的反应。
2
In the case of valericacid, for example, that concentration was seven parts per trillion-a level only just detectable by bloodhounds.
比如，缬草酸的汗臭味浓度为万亿分之七，这种浓度只有警犬才能发觉。
3
Most of the specimens containing acetic acid, propionic acid, butyric acid, isobutyric acid, valericacid, lactic acid and succinic acid which were accorded with the result of bacteriologic study.