When someone had been exposed to valeric acid, 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。
In the case of valeric acid, 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。
Most of the specimens containing acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, lactic acid and succinic acid which were accorded with the result of bacteriologic study.
在大多数标本中含有乙酸、丙酸、丁酸、异丁酸、戍酸、乳酸和琥珀酸，与细菌培养的结果基本相符。
If propionic, butytric, iso-valeric, hexanic acid et al short-chain fatty acids were detected in urine of human, the urine can be regarded as pathologic urine.
实验表明：正常人尿样中仅能检出乙酸和微量丙酸、若尿样中存有丙酸、异戊酸、已酸等短链脂肪酸均可认为是病理性尿。
If propionic, butytric, iso-valeric, hexanic acid et al short-chain fatty acids were detected in urine of human, the urine can be regarded as pathologic urine.
实验表明：正常人尿样中仅能检出乙酸和微量丙酸、若尿样中存有丙酸、异戊酸、已酸等短链脂肪酸均可认为是病理性尿。
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