系统软件是计算机产厂商提供的，为便于计算机的使用而开发的软件包，由一系列大型程序构成。
System software is the collection of large programs consisting of the software provided by the computer manufacturer to facilitate the use of its computer.
这包日本产的糖果宣称你吃了它后就会美丽动人。
It's a Japanese candy that supposedly makes you beautiful after eating it.
采用交流碳弧法高效合成碳包碳化铁纳米晶磁性微粉，磁性微粉产率达90 %以上。
A highly effective method for preparation of carbon-coated iron carbide nanocrystals by AC carbon arc discharge was studied, the yield of magnetic micro powder was over 90%.
采用交流碳弧法高效合成碳包碳化铁纳米晶磁性微粉，磁性微粉产率达90 %以上。
A highly effective method for preparation of carbon-coated iron carbide nanocrystals by AC carbon arc discharge was studied, the yield of magnetic micro powder was over 90%.
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