帮忙翻译文章、要自己翻译Earthquakes are the shaking, rolling or sudden s

帮忙翻译文章、要自己翻译
Earthquakes are the shaking, rolling or sudden shock of the earth’s surface. Earthquakes happen along “fault lines (断层线)” in the earth’s crust(地壳). Earthquakes can be felt over large areas although they usually last less than one minute. Earthquakes cannot be predicted—although scientists are working on it!　　Most of the time, you will notice an earthquake by the gentle shaking of the ground. You may notice hanging things swaying1 or objects shaking on shelves. Sometimes you may hear a low rumbling (隆隆声) noise or feel a sharp shake. A survivor of the 1906 earthquake in San Francisco said the feeling was like riding a bicycle down a long flight of stairs.　　The intensity2 of an earthquake can be measured. One measurement is called the Richter scale (里克特震级). Earthquakes below 4.0 on the Richter scale usually do not cause damage, and earthquakes below 2.0 usually can’t be felt. Earthquakes over 5.0 can cause damage. A magnitude (震级) 6.0 earthquake is considered strong and a magnitude 7.0 is a major earthquake. The North-ridge Earthquake, which hit Southern California in 1994, was magnitude 6.7.　　Earthquakes are sometimes called, quakes, shakes or seismic activity. The most important thing to remember during an earthquake is to DROP, COVER and HOLD ON. So remember to DROP to the floor and get under something for COVER and HOLD ON during the shaking.