对从不同原料中提取金属镓的研究进展进行了综述，并提出应加强金属镓提取技术的研究与开发。
The research progress on extraction of gallium from different raw materials is summarized, and enhancing experiment on extracting technology of gallium is proposed.
你看到的不是壁板，而是加强用的骨架。 因为建造这些墙的材料是金属。
What you see is not siding but enforcement ribs as the walls of the construction are made of metal.
当局的反应是加强保卫，在公共场所增加武装岗哨，在车站和宾馆门口装配金属探测仪。
The response of the authorities has been to beef up security, with armed guards in public areas and doorway metal detectors in stations and hotels.
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