他指着一颗单独放在一块鹿皮上的大珠子，这珠子晶莹无瑕，有颗小核桃大小。
He pointed to a large perfect pearl the size of a small walnut that lay apart on a piece of chamois .
研究表明，破损的程度与珠子的速度、材料、大小有密切关系。
The investigation showed that the damage degree of balls depends on the material, velocity and the size of the balls.
研究表明，破损的程度与珠子的速度、材料、大小有密切关系。
The investigation showed that the damage degree of balls depends on the material, velocity and the size of the balls.
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