I opened some of the bottles, smelt them, and put the stoppers to my lips. 查尔斯·狄更斯.双城记.
The mixture should be preserved in bottles with glass stoppers, as the benzine is very volatile. 威廉K.戴维.智者、化学家和伟大医生的秘密.
It can be used with a common pen, but must be kept in bottles coated inside with paraffine, beeswax, or gutta-percha, with rubber stoppers. 威廉K.戴维.智者、化学家和伟大医生的秘密.