文档介绍：地质类
active /ˈæktɪv/ adj
【VOLCANO】an active volcano is likely to explode at any time
The volcano became active last year with a series of eruptions.
volcano /vɔlˈkeɪnəu US vɑːlˈkeɪnou/ n [C] plural volcanoes or volcanos
a mountain with a large hole at the top, through which lava (= very hot liquid rock) is sometimes forced out
Pompeii was destroyed when the volcano erupted in 79AD.
active volcano (= one that may explode at any time)
dormant volcano (= one that is not active at the moment)
extinct volcano (= one that is no longer active at all)
aluminum /əˈlumɪnəm/ n [U]
a light metallic element which is silver in color and used especially for making cooking equipment and aircraft parts
an aluminum saucepan
Cover the fish with aluminum foil and cook over a low heat for 4 to 5 minutes.
We take all our aluminum cans for recycling.
bonanza /bəˈnænzə, bəu- US bə-, bou-/ n [C]
a lucky or successful situation where people can make a lot of money
2002 will be a bonanza year for the computer industry.
an amazing cash bonanza
an exceptionally large and rich mineral deposit (as of an ore, precious metal, or petroleum)
borehole /ˈbɔːhəul US ˈbɔːrhoul/ n [C]
a deep hole made using special equipment, especially in order to get water or oil out of the ground
cataclysm /ˈkætəklɪzəm/ n [C]
literary a violent or sudden event or change, such as a serious flood or earthquake
>cataclysmic /ˌkætəˈklɪzmɪk/ adj [usually before noun]
continental crust
crater /ˈkreɪtə US -ər/ n [C]
a round hole in the ground made by something that has fallen on it or by an explosion
craters on the moon's surface
the round open top of a volcano
diamond /ˈdaɪəmənd/ n
[U and C] a clear, very hard valuable stone, used in jewellery and in industry
a diamond engagement ring
[C] a shape with four straight but sloping sides of equal length, with one point facing directly up and the other directly down
Cut the cookie dough into diamonds.
emerald /ˈemərəld/ n