Shells set the trees on fire. The wounded could not escape the flames.

炮弹引起了树木着火，伤兵们根本无法从浓烟中逃出去，他们痛苦的尖叫声响彻天空。

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Because the judgment criteria on the escape time algorithm is improved, the object set is the boundary set.

因为改进了逃逸时间算法的判别标准，因此，目标集合是边界点集。

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Shells set the trees on fire. The wounded could not escape the flames. Their screams filled the air.

枪林弹雨，森林失火，（烈焰冲天，）伤兵无处可逃，惨叫声弥漫浓烟之中，（令人不忍耳闻。）

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Skip the Sundance scene and set your sights on this week's escape, where the only stars you'll see are the ones in the luminous night sky.

BBC: Daily deal: Two nights at Solitude Mountain

In the fighting, a police armoured vehicle was set on fire but the occupants managed to escape.

BBC: Berlusconi vows to punish rioters after Rome protest

The new Peter Weir film, loosely adapted from an unreliable memoir by Slavomir Rawicz, is about a bunch of prisoners who escape from a Siberian labor camp in 1940 and set out on the long trek back to civilization.

NEWYORKER: The Way Back