海啸是如何产生的  How Tsunamis Work?（TED-Ed）    In 479 BC, when Persian soldiers besieged (包围) the Greek city of Potidaea, the tide retreated (撤退) much farther than usual, leaving a convenient...

关于海啸的读后续写英语作文Tsunami is usually caused by strong earthquakes that happen in oceans.Great sea waves will be pushed towards the shores with great speed.If the people along the shores don't know tsunami...

关于海啸英语作文  关于海啸  Tsunami is usually caused by strong earthquakes that happen in oceans.Great sea waves will be pushed towards the shores with great speed.If the people along the shores don't...