hard grains 中文意思是什麼
hard grains
解釋
粗晶糖-
Grinding wheel continues with an infinite number of hard, sharp and refractory grits on edge surface at a high speed of swing operation to cut and grind over the surface of work piece, and unceasing self - sharpening grains and pore continue to grind a tool for every kind of material
砂輪是經由高速回轉運作中，以其在外緣表面植無數上千萬之硬銳耐溫之小磨粒連續在工作物表面切削磨除，且不斷的自生銳利顆粒與磨屑空隙氣孔，繼續對各種材料做磨削工作的一種研磨工具。 -
The hard coats of spores and pollen grains are preserved better, forming microfossils
孢子和花粉粒的堅硬外殼被完好保留下來形成微化石。 -
To cite but one example : the development around 1840 of metal rollers for grinding grain helped to open up huge new opportunities for wheat farmers in eastern europe and the united states, areas that produced mainly hard high - gluten grains that had proved difficult to mill with earlier stone - grinding technology
19世紀40年前後穀物碾磨業所發明的金屬磙筒為東歐和美國的麥農提供了大量的新機會。這些地區主要生產高粘度的實心穀物，用早期的石碾技術處理起來非常困難。 -
1687 thomas kincaid described golf balls as being made of thick and hard leather not with pores or grains
描敘當時的高爾夫球為「厚而硬的皮織品，內無小孔或穀物」 。
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