Together with silver-white light, to draw a perfect arc, from the loss of vision gradually.
一道银白色的光线，划着完美的弧线，从视野里逐渐的消失。
The conclusions we draw can also play a directive role in highway double-arc tunnel construction.
所得结论对公路双连拱隧道的建设有重要的工程指导意义。
The conclusions we draw can also play a directive role in highway double-arc tunnel construction.
所得结论对公路双连拱隧道的建设有重要的工程指导意义。
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