Studied the effect of citric acid, lactic acid and acetic acid on the black memtrane elimination of fresh beef omasum.
研究了柠檬酸、乳酸和醋酸对鲜牛百叶的脱黑膜作用。

The Parent's Alert home drug test, marketed by ChemTrak, is a laboratory test for alcohol and drugs such as marijuana and cocaine.
由ChemTrak推向市场的'家长警报'家庭药物测试是化验室用于检测酒精和诸如大麻、可卡因这样的毒品的方法。

The rememtrance roused a whole train of association.
这句话勾起许多联想。

ChemTrak, though, takes a different twist:
不过，ChemTrak有不同的看法：

If a problemtracking system is in place, it should encapsulate these determinations.
多种商业的，追踪问题的软件管理工具是可以使用的。