1. Spec 1170 is a memory. 
   spec1170标准已成为记忆。
2. He bought oil-company shares on spec. 
   他买入石油公司股票进行投机。
3. This winter, another 850 to 1000 million cu.m.will be dug. 
   今年冬天我们还要挖8。5到10亿土方。
4. They told me on the phone that all the tickets for the concert had been sold, but I got two that had been returned on spec. 
   他们在电话里告诉我，音乐会的票全部售完了，但我还是搞到两张高价退票。
5. A black mineral with a metallic luster, essentially(Ag, Cu)16Sb2S11, that is an ore of silver. 
   硫锑铜银矿一种带有金属光泽的黑色矿石，主要为（ag，cu）16sb2s11，是一种银矿石

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