某珍珠的特征是白色，浑圆形，珍珠光泽，手电透光照射见条带效应，它是（）.

评价珍珠质量的原则是根据珍珠的颜色、光泽、（）（）、瑕疵及有核养殖的珍珠层厚度。

珍珠光泽产生的原因主要是（）

珍珠光泽产生的原因主要是光的（）。

翻译：With Average or With Particular Average（WA or WPA）（）

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

雄人鱼第一次给渔夫珍珠、红宝石等珍宝时，渔夫（）卖面饼的阿卜杜拉。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在宝石学中，光泽强弱可分为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。