They need a certain amount of weight in order to keep a tight grip on the rails.
它们本来就需要相当的重量来使自己紧紧咬合住铁轨。
Fortunately, some well-staged action scenes and an emphatic performance from former television star Zo In-sung as a nice guy in a nasty line of work keep a Dirty Carnival on the rails.
幸运的是，精心设计的动作场面和明星赵寅成强有力的表演使本片取得了不俗的成绩。
The concrete can be used to dust, damp sponge rails and grooves on clean with a dry sponge, once more, to keep clean seal.
具体可以先用干净的湿海绵拭擦滑轨、沟槽上的灰尘，再用干海绵擦拭多一次，以保持密封圈的清洁。
New Relic announced that 37signals—the company behind Ruby on Rails—uses their Ruby on Rails performance management solution RPM to keep the performance of their applications humming.
NewRelic公司宣布37signals—Rubyon Rails背后的公司—使用了他们提供的Ruby on Rails性能监控器RPM来保证其应用的正常运转。
By adopting the technical scheme, the device has a simple structure, can keep the guide rails to be always unblocked, and further has no influence on movement of a front telescopic guide rail.
采用以上技术方案后，该物品传送接轨装置结构简单、可以保持导轨始终畅通，并且还不影响其前方的可伸缩导轨的移动。
Instead of tracks laid on the ground, many of China's high-speed trains run on elevated rails to spare farmlands and keep the towns along the routes intact.
高速铁路采用“以桥代路”，有效节约了耕地，减少了对沿线城镇的切割。
By taking a constant interest in his son's progress, he helped to keep him on the rails when so many other young men were falling foul of the law.
他一直关注着儿子的成长；当许多别的年轻人违法犯案时，他总是促使他安分守已。
By taking a constant interest in his son's progress, he helped to keep him on the rails when so many other young men were falling foul of the law.
他一直关注着儿子的成长；当许多别的年轻人违法犯案时，他总是促使他安分守已。
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