M: hi, Cathy. I am here because I visited caves all over North America. Since you are going to study cave formations, Dr. Bow asked me to come to share some of my experiences with you.
W: Hi, Bill. So wonderful!I can’t wait to hear about it!
M: Recently, I visited the La Chagire Cave in New Mexico,(1)___________________________. I had a chance there, because La Chagire is so large that discoveries are frequently made there.
W: Was it newly discovered?
M: The cave was not even discovered until 1986. However, people in that area had figured that there must be a cave nearby,(2)___________________________. Enormous amount of air enter and exit the cave in order to maintain balance of the pressure with the inside air.
W: You must have had to fight heavy wind when you were in the cave.
M: Exactly, I had to fight 45 mile per hour winds. After all that effort, I had to be extremely careful maintaining my energy level. (3)_______________________________.
W: Anything interesting or thrilling in the cave?
M: There are formations in La Chagire that look like ocean waves, Christmas trees and other stuff no one has ever seen before.
W: Caves are normally created by carbonic acid, right?
M: But this cave sculpted out by very powerful sulfuric acid that swells up from below.
发表于 2015-7-21 15:33
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发表于 2015-7-29 01:13
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