单词：drilling with step core drill
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2059 、 铸模；模子 mould 2060 、 铸模成形；倒模成形；模塑 moulding 2061 、 铸钢；生钢 caststeel 2062 、 铸铁；生铁 castiron 2063 、 廿三画 2064 、 纤维 fibre 2065
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Lesson 55 Television Day: The search for oil TV Commentary: Almost everyone in the world uses oil in some way. Without oil, the world will stop, so men look for it everywhere. In our film today, you can see some oilmen. They are drilling for oil. Th
朗文3L看听学英语第三册
Technique May Eliminate Drill-and-Fill Dental Care For over a hundred years, dentists have been repairing cavities by removing the decayed tooth tissue with a drill and filling the hole with metal or plastic material. Depending on the cavitys depth,
VOA标准英语2015年(八月)
China's first domestically-made submersible deep-sea drill completed its first trial run in the South China Sea on Sunday. The Sea Bull spent ten hours drilling 60 meters into the seabed under 3,000 meters of water. China is now the fourth country to
cctv9英语新闻2015年
bed, deposit, field 书馆 矿床 outcrop 露头 fault 断层 vein, sean, lode 矿脉 gold reef 金矿矿脉 pocket 矿穴 reservoir 储藏 water table 潜水面，地下水面 mine 矿 stratum, layer 矿
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JUDY WOODRUFF: The Obama administration has essentially cleared the way to allow Royal Dutch/Shell to begin drilling for oil and gas in the Arctic Ocean this summer. It's one of the most consequential and long-awaited drilling decisions from the gove
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