Morphine: Heterocyclic compound, narcotic analgesic alkaloid originally isolated from opium.吗啡: 杂环化合物, 从鸦片分离出的麻醉性镇痛药镇痛药生物碱.We have, therefore , in both of the examples above, heterocyclic compounds with " built - in " or...
Builders must fasten down roofs of newly-built homes more securely.建造工人必须把新建房屋的屋顶固定得更牢靠些。1.4 million council homes have been sold, mostly to sitting tenants.已经出售了140万套廉租公房，大部分购买者都是房子的承租人。Thousands are desperately trying ...