在上述各种力的共同作用下，长轨条强度和稳定不得超过允许限度。
The strength and stability of these long rails are not permitted to exceed the allowable limit under the joint action of the aforecited forces.
进入试验场，我看见两套正运转的空中脚踏车模拟装置。 轨道在树和玉米地间穿进穿出，一个是8字形悬轨，另一个的8字有大概一英里长。
When I pulled into the property, I could see two functioning test models of Skyride weaving in and out of the trees and cornfields; one a figure-eight track, the other an eighth of a mile around.
9月22日由欧南方天文台智利点发布的极端长曝光的“日轨图”中太阳横穿天空约180次。
The sun crosses the sky roughly 180 times in an extremely long-exposure "solargraph" released by the Chile-based European Southern Observatory (ESO) on September 22.
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