1. Oxygen is one of the important elements in the physical world,which is very active chemically.
化学活跃性极强的氧气是物质界最重要的元素之一。
2.The finding could also lead to drugs tailored to attack specific types of cancer; thereby lessening our dependence on tissue-destroying chemotherapy and radiation.
这一发现还可以带来治疗特殊类型癌症的药物,并由此减轻我们对可以破坏组织的化疗和放疗的依赖。
3.Heat it with hot water for several minutes,cool,and add 1or 2 drops of ferric chloride TS:a violet-red color is produced.
用热水加热数分钟,冷却,然后加入1或2滴氯化铁。测试结果显示:会有紫红色出现。