该会议呼吁使研究政策成为加强国家卫生系统努力不可缺少的一部分。
It called for research policy to be made an integral part of the effort to strengthen national health systems.
到了1890，家庭用电的使用仍在继续，而且电已成为20世纪人们生活不可缺少的一部分。
By the 1890s it was clear that domestic electricity was here to stay, and would be an indispensable part of 20th-century life.
在未来的几年中，无线电通讯会日益成为人们日常生活结构中不可缺少的一部分。
In years to come, wireless communications will increasingly become part of the fabric of everyday life.
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