★英語聽力頻道為大家整理的初中英語聽力下載mp3：智利地震如何使地球一天時(shí)間縮短，供大家參考。更多閱讀請查看本站英語聽力頻道。
The massive earthquake that struck Chile in February 2010 might have shortened Earth's day by 1.26 microseconds, according to calculations by a NASA scientist. An EarthSky Facebook friend asked us how. And the answer is for the day to get shorter, Earth's rotation has to speed up.
根據(jù)美國航天航空局科學(xué)家的計(jì)算，2010年2月的智利大地震使地球一天縮短1.26微妙。EarthSky的Facebook好友詢問我們這一現(xiàn)象是如何發(fā)生的。答案即：地球自轉(zhuǎn)加快了，一天的時(shí)間才會(huì)變短。
Richard Gross: The Earth's rotation changes all the time. It speeds up and it slows down and it wobbles as it rotates. These changes are caused by anything that moves mass around on the Earth.
理查德·格羅斯：地球的自轉(zhuǎn)是時(shí)刻改變的，時(shí)而加速，時(shí)而減速，在旋轉(zhuǎn)的時(shí)候還會(huì)擺動(dòng)。地表任何劇烈的運(yùn)動(dòng)都會(huì)引發(fā)這些變化。
That's Richard Gross, of NASA's Jet Propulsion Laboratory. He is the scientist who performed the calculations.
這位是NASA噴氣推進(jìn)實(shí)驗(yàn)室的理查德·格羅斯，是完成該計(jì)算的科學(xué)家。
Richard Gross: This is just like a spinning ice skater who will spin faster as she brings her arms closer to her body. The net result of the mass motion that was everywhere within the earth was to rearrange the Earth's mass in such a manner that it brought it a bit closer to the Earth's rotation axis causing the Earth to rotate a bit faster and the length of the day to be a bit shorter.
理查德·格羅斯：花樣滑冰者在旋轉(zhuǎn)時(shí)收回手臂就會(huì)轉(zhuǎn)的更快，這其實(shí)和地球旋轉(zhuǎn)的原理是類似的。地球內(nèi)部各處地塊運(yùn)動(dòng)的最終結(jié)果是使地球質(zhì)量重新分布，向地球旋轉(zhuǎn)軸靠近一點(diǎn)點(diǎn)，加快地球旋轉(zhuǎn)，一天的長度也就縮短一點(diǎn)。
Dr. Gross said there won't be any practical consequences from the shortening of our day. In fact, winds and oceans currents have an even bigger effect on the length of the day than this earthquake did. In the end, the change is too small to detect even with the most sophisticated instruments.
格羅斯博士說一天時(shí)間的縮短不會(huì)帶來任何實(shí)際后果。事實(shí)上，相對地震，季風(fēng)和洋流對一天時(shí)間長短的影響更大。最終，這種變化小到最精密的儀器都檢測不到。
The massive earthquake that struck Chile in February 2010 might have shortened Earth's day by 1.26 microseconds, according to calculations by a NASA scientist. An EarthSky Facebook friend asked us how. And the answer is for the day to get shorter, Earth's rotation has to speed up.
根據(jù)美國航天航空局科學(xué)家的計(jì)算，2010年2月的智利大地震使地球一天縮短1.26微妙。EarthSky的Facebook好友詢問我們這一現(xiàn)象是如何發(fā)生的。答案即：地球自轉(zhuǎn)加快了，一天的時(shí)間才會(huì)變短。
Richard Gross: The Earth's rotation changes all the time. It speeds up and it slows down and it wobbles as it rotates. These changes are caused by anything that moves mass around on the Earth.
理查德·格羅斯：地球的自轉(zhuǎn)是時(shí)刻改變的，時(shí)而加速，時(shí)而減速，在旋轉(zhuǎn)的時(shí)候還會(huì)擺動(dòng)。地表任何劇烈的運(yùn)動(dòng)都會(huì)引發(fā)這些變化。
That's Richard Gross, of NASA's Jet Propulsion Laboratory. He is the scientist who performed the calculations.
這位是NASA噴氣推進(jìn)實(shí)驗(yàn)室的理查德·格羅斯，是完成該計(jì)算的科學(xué)家。
Richard Gross: This is just like a spinning ice skater who will spin faster as she brings her arms closer to her body. The net result of the mass motion that was everywhere within the earth was to rearrange the Earth's mass in such a manner that it brought it a bit closer to the Earth's rotation axis causing the Earth to rotate a bit faster and the length of the day to be a bit shorter.
理查德·格羅斯：花樣滑冰者在旋轉(zhuǎn)時(shí)收回手臂就會(huì)轉(zhuǎn)的更快，這其實(shí)和地球旋轉(zhuǎn)的原理是類似的。地球內(nèi)部各處地塊運(yùn)動(dòng)的最終結(jié)果是使地球質(zhì)量重新分布，向地球旋轉(zhuǎn)軸靠近一點(diǎn)點(diǎn)，加快地球旋轉(zhuǎn)，一天的長度也就縮短一點(diǎn)。
Dr. Gross said there won't be any practical consequences from the shortening of our day. In fact, winds and oceans currents have an even bigger effect on the length of the day than this earthquake did. In the end, the change is too small to detect even with the most sophisticated instruments.
格羅斯博士說一天時(shí)間的縮短不會(huì)帶來任何實(shí)際后果。事實(shí)上，相對地震，季風(fēng)和洋流對一天時(shí)間長短的影響更大。最終，這種變化小到最精密的儀器都檢測不到。