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- They move under the influence of the dynamo currents in the Earth 's core , as well as electric currents flowing in the ionosphere, the radiation belts and the Earth 's magnetosphere. 它們在地核內發(fā)電機流以及流動(dòng)在電離層、輻射帶和地球磁氣圈內電流的影響下產(chǎn)生移動(dòng)。
- Our pilotless rocket enters the track of the earth. 我們把一個(gè)無(wú)人駕駛的火箭送入了地球的軌道里。
- The attraction of the moon for the earth causes the tides. 月球對地球的吸引力造成潮汐。
- The earth is only a speck in the universe. 地球在宇宙中只不過(guò)是一個(gè)小點(diǎn)罷了。
- The earth's magnetosphere is at once protective and dangerous. 地球的磁層既具有保護的功能，卻又極其危險。
- How on earth do they manage to rob the bank? 他們到底怎么搶了銀行的？
- A number of satellites are now circling the earth. 一些人造衛星現在正環(huán)繞地球飛行。
- The machine cast up a big heap of earth. 機器卷起了一大堆泥土。
- The red sun lights up the sky and the earth. 紅太陽(yáng)照亮了天空和大地。
- Who on earth is that female he's with? 跟他在一起的那個(gè)女人究竟是誰(shuí)?
- Antarctica is the loneliest place on earth. 南極是地球上最偏遠的地區。
- He dived his hand into the earth. 他將手插入泥土中。
- Earth worms are often used as bait. 蚯蚓常用作魚(yú)餌。
- The earth in the garden is good, soft soil. 花園里的泥土松軟肥沃。
- Many kinds of animals have vanished from the earth. 許多動(dòng)物已人地球上消失了。
- The heavy wheels churned the earth into mud. 笨重的車(chē)輪將大地碾成了泥漿。
- What percentage of the earth is covered by oceans? 地球上百分之多少被海水覆蓋著(zhù)？
- The heated air drinks up the moisture of the earth. 熱空氣把土里的濕氣都吸干了。
- A sweet smell emanates from the earth after rain. 雨後一種香氣從地面發(fā)散出來(lái)。
- There are millions of living things on the earth. 世界上有數以百萬(wàn)計的生物。
