The dug-outs were secure from everything but a direct hit.除非是直接被击中，否则这个地下掩体是非常安全的。He took a shovel, dug a hole, and buried his once-prized possessions.他拿起一把铁锨，挖了个坑，将自己曾经珍爱的物品埋了起来。Two men were standing by the freshly dug ...
It makes melt , plasticating, injection and pressure corse go on in the state of vibrating periodically.分析了此种振动装置在注射阶段脉动螺杆的动态响应以及振幅和频率的特性.The ice cream softened and began to melt.冰淇淋开始变软并开始融化。One of the key problems in i...