子类型也可以向基类型增加更多的元素和属性声明。

A subtype can also add more element and attribute declarations to the base type.

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今天，布朗先生说：“昨天，我为自己所犯的错误，向雅基·琼斯道了歉。”

Mr Brown said today: "I apologised to Jacqui Janes yesterday for any mistakes that had been made."

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此外，相对自由的年轻的专业人员和拉丁美洲人向落基山脉地区的移居活动并没有要停止的迹象。

Moreover, the migration of relatively liberal young professionals and Latinos to the region shows no signs of stopping.

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This represents the upright struts on a ladder that I showed you before, it represents this backbone that's shown by - that's formed by polymerizing the pentose's together through phosphate's always going 5' to 3', 5' to 3'.

线条代表梯子,上下的支柱 之前给你们演示过,代表由多聚戊糖分子,通过磷酸基从5'端向3'端方向,连接起来的主链

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