tsunami海啸介绍英语PPT
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（一个明显的海啸即将来临的征兆是“缺点”，当海水快速退去或 沿海岸线水位异常下降。）
How to Байду номын сангаасredict it?
Experts believe that a receding ocean may send out a warning and give people five minutes to evacuate[ɪ'vækjʊeɪt] （撤退）.
How tsunami work?
· the undersea earthquake
· the volcanic explosion of the seabed
How to predict it?
A great warning sign of an approaching tsunami is "drawback",when the seawater recedes quickly or the water level fall unusually along the shoreline.
海啸
第一小组
What is the tsunami？
· Tsunami is a kind of waves,which has a strong destruction. · The waves of tsunami are water, and their height can higher than 10 meters to dozens of meters, form a "water wall".
Please remember
• You're not out of danger after the first wave of a tsunami. • Move away from the shoreline and go to higher ground as soon as you can.
The end
How to Байду номын сангаасredict it?
Experts believe that a receding ocean may send out a warning and give people five minutes to evacuate[ɪ'vækjʊeɪt] （撤退）.
How tsunami work?
· the undersea earthquake
· the volcanic explosion of the seabed
How to predict it?
A great warning sign of an approaching tsunami is "drawback",when the seawater recedes quickly or the water level fall unusually along the shoreline.
海啸
第一小组
What is the tsunami？
· Tsunami is a kind of waves,which has a strong destruction. · The waves of tsunami are water, and their height can higher than 10 meters to dozens of meters, form a "water wall".
Please remember
• You're not out of danger after the first wave of a tsunami. • Move away from the shoreline and go to higher ground as soon as you can.
The end