文章通过选样、筛分、磨样、烘样、溶样等手段对样品进行处理，并按标准ISO9507-1990对样品进行全铁含量检测，考察铁含量随不同粒径块铁矿的变化。
The samples were dealt with selection, sieve, grinding, drying and dissolving. The samples were tested according to ISO9507-1990, the variation of iron content at different particle sizes was studied.
鲨鱼皮有很好的韧性，摸上去像砂纸一样磨手，容易切割。
The skin of the shark is very tough, sandpapery and abrasive, it could cut.
星巴克用了20年所追求的“圣杯”速溶咖啡的味道和新磨的一样好。
Starbucks itself has spent 20 years pursuing the holy grail of an instant coffee that tastes as good as the fresh stuff.
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