Technology of Digital Television (DTV) broadcasting is the third revolution in the technical history of TV broadcasting.
数字电视广播技术是广播电视技术史上的第三次飞跃。
At the beginning of the third stroke of the cycle of operations, the piston is once again at TDC, the crankshaft having turned through one full revolution.
在工作循环的第三个冲程开始，活塞再次位于上止点，曲轴已经旋转了一整周。
At the beginning of the third stroke of the cycle of operations, the piston is once again at TDC, the crankshaft having turned through one full revolution.
在工作循环的第三个冲程开始，活塞再次位于上止点，曲轴已经旋转了一整周。
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