While you can certainly use the Windows GDI as a high-level vector drawing system, you can also use it for relatively low-level pixel manipulation.

当你的确可以将Windows GDI用作高层次的矢量绘图系统时，你也可以将它用于相关的低层次的像素操作。

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Using RNA virus as vaccine vector are becoming hotspots in the field of vaccine research these years for their prominent advantages such as easy manipulation and high efficiency.

RNA病毒作为疫苗载体，在可操作性和免疫效果方面有着显著的优势，近年来已成为疫苗研究领域的热点。

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