Cities such as Jackson, Shreveport, Dallas and Forth Worth stand out along Interstate 20 and, at left, so do Little Rock and Oklahoma City.

杰克逊市、什里夫波特市、达拉斯市和沃斯堡市沿着20号州际公路连成一排，左侧是小石城和俄克拉荷马城。

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They work with remote control devices that change the direction, position and speed of a German-made cutting machine that slices back and forth along a 300-metre-wide coal face.

他们操作的遥控装置可以改变截煤机的方向、位置和速度，这台德国产的截煤机可以沿着一道300米宽的煤面来回进行切割。

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Aeroplanes flew back and forth along a single route, often between quiet, out-of-the-way airports, rather than using busy hubs.

飞机在单一路线上来回飞行，通常降落在宁静又偏僻的机场，而不是繁忙的交通枢纽。

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It's the various programs you run on your computer along with the various data files that you have saved on your hard drive,and so forth.

是你自身这个电脑中运行的各种程序,硬盘存有的各种数据和文件，类似种种。

耶鲁公开课 - 死亡课程节选

Their wailing mingled with the sirens of ambulances scurrying back and forth along the route to pick up the dozens who fainted.

CNN: ISOLATED IN THEIR GRIEF

On 1 December the man was traced when rescuers listened to the background noise of the helicopter travelling back and forth along the mountainside to pinpoint his location.

BBC: Helicopter over Snowdonia

There was smoke and a terrible warmth, a gray sun rising and falling in what seemed like a matter of minutes, and the tiger, frenzied, dry-tongued, ran back and forth along the span of rusted bars.

NEWYORKER: The Tiger��s Wife