那时，大约二十码外的一辆小型货车后门突然敞开。
At that instant, the rear doors of a panel truck some twenty yards away flew open.
除了书本知识外，学习还意味着敞开心扉，而且还会得到各种各样的经验。
But, far beyond books, learning means keeping the mind open and active to receive all kinds of experience.
本文讨论了敞开式桁架弦杆的平面外稳定性计算方法，并给出了计算实例。
The stability calculation of chords on open lattice beyond the main truss plane is discussed in the article. A calculation example is presented.
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