Move the pointer over the top edge of the top rail.

将指针移到侧轨的外边缘。

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Working from swinging scaffolds and "Tube Lox" scaffold not equipped with mid and top rail.

在摇晃的鹰架和管架上作业，且在中部和上部未安装护栏。

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Something, such as the top rail of a fence, that rests on or is supported by something else.

依靠或被别的物体支撑的物体，如篱笆上部的横梁现代英汉词典。

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Crew members were not obliged to wear life jackets and the skipper condoned standing on the top rail, the report said.

BBC: Fisherman who fell overboard was 'not wearing life jacket'

The North Pembrokeshire Transport Forum said five or more shuttle services a day between Carmarthen and Fishguard were among the top rail priorities in the regional transport plan submitted to the assembly government.

BBC: Youngsters call for more trains

Tidal surge piled 24 rail cars on top of the New Jersey Turnpike near exit 12.

FORBES: New Jersey Governor Chris Christie Calls Damage To State 'Unfathomable' And 'Terrible'