英语听力精选进阶版 14004（在线收听） |
California earthquake drill Vocabulary drill training exercise the 'big one' a massive earthquake fault break in the earth's crust, which can cause earthquakes Richter scale a series of numbers used to measure the strength of an earthquake long overdue expected for a long time seismologist scientist who studies earthquake risks likely dangers preventable avoidable reflex action automatic behaviour, something done without thinking about it race run quickly |
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