The girders are carried on trestles .

这些大梁是由支架撑着。

The trial passes through eleven tunnels and over nine trestles , towering hundreds of feet above the valley floor .

审判经过11个隧道，9栈桥，上述谷底高耸的数百英尺。

Trestles cw ti : sapphire laser illuminates carbon nanotube field effect transistors and measure it 's electrical characteristics .

栈桥连续钛：蓝宝石激光照亮碳纳米管场效应晶体管和衡量它。

May I ask who trestles beg you are willing to a stable dwelling place , then start a new life .

我可以问高架桥上行乞的人你们愿不肯意到1个不变的寓所,之后起头新的人的生活。

Brief text and illustrations trace the journey of a colorful train as it goes through tunnels , by cities , and over trestles .

一辆多彩的列车穿过隧道，经过城市，跨越高桥。简短的文字，简明的图画。