我相信了他的新装置的实用性.I was persuaded of the usefulness of his new device.图5-2人物角色的实用性的简单示例.Figure 5 - 2 : A simplified example of how personas are useful.吉他的试验均未能激起任何关于电收尘原理的实用性研究.Guitar's experiments did not stimulate any...
The Marshal stepped over the vacuum-cleaner and stumped out of the room.元帅迈过真空吸尘器，脚步沉重地走出了房间。He stepped out of the shower and began towelling himself down.他走出淋浴间，开始用毛巾把身子擦干。He stepped in front of her, barring her way.他走到...
a method of smelting iron一种炼铁方法Darby was looking for a way to improve iron when he hit upon the idea of smelting it with coke instead of charcoal.达比一直在寻找改善铁质的方法，他猛然想到可以不用木炭熔炼，而改用焦炭。Fire provided a means of smelting ores....
The firm has been dispensing ointments.本公司配制药膏.A range of ointments and creams is available for the treatment of eczema.有一系列治疗湿疹的油膏和乳膏可以买到。Antibiotic ointments are useful for concurrent bacterial infections.抗菌素软膏对伴发的细菌感染...