Different genes are turned off and on in different cells at different times to form specific tissues and organs as the embryo develops.
随着胚胎的发育，不同的基因在不同时间和细胞处于开启和关闭状态从而形成特定的组织和器官。
Art, the spirit carrier of human culture, develops and changes as The Times change.
艺术作为人类文化的精神载体，随着时代的演变而不断更新与进步。
As the Internet information technology develops rapidly, many new and effective purchase methods emerged as The Times require.
信息网络技术的飞速发展，许多新型的、高效的采购方式应运而生。
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