您要查找的是不是：
- Salt is a common food preservative. 盐是一种常用的食物防腐剂。
- The nurse diluted the drug with saline water. 护士用生理盐水把药加以稀释。
- Salt has a preservative effect on food. 盐对食物有防腐作用。
- He painted the posts with a preservative liquid. 他在柱子上涂上了起保护作用的液体。
- We are testing the efficacy of a new drug. 我们正在测试新药的功效。
- I am surprised to learn that he is taking drug. 听说他在吸毒，我很吃惊。
- His business was a cover for drug dealing. 他的商行是进行毒品交易的幌子。
- Use of this drug is now fairly generalized. 这种药现在用得相当普遍。
- He was convicted of drug offences and deported. 他被判犯有毒品罪而遭驱逐出境。
- She pioneered the use of the drug. 是她最先使用的这种药品。
- Salt is a preservative for meat. 盐是肉类的防腐剂。
- The new drug has performed well in tests. 那种新药试验效果不错。
- A drug, especially an illicit or addictive one. 麻醉剂尤指非法使用或使人上瘾的麻醉剂
- This new drug is not yet commercially available. 这种新药还没有投放市场。
- The drug affects one's power(s) of concentration. 这种药影响人精神不能集中。
- The drug has no undesirable side-effects. 这种药没有什么不良的副作用。
- A drug or preparation containing arsenic. 砷化合物含砷的药剂或制剂
- They were arrested for drug offences. 他们因贩卖毒品罪而被逮捕。
- Does the drug take long to act on the pain? 这药是否需要很长时间才能发挥止痛作用？
- Police are cracking down on drug dealers. 警方现对贩毒分子严惩不贷。
