气体的压强是由这些粒子对容器壁的撞击造成的.The pressure is caused by the bombardment of the container walls by these particles.依照理论, 物质只能在粒子 - 反粒子对中产生.According to the theory, matter can only be created in particle - antiparticle pairs.湮灭能产生...
As she was about to doze off, Chun Bao woke up.等她朦朦胧胧地刚离开思索将要睡去, 春宝又醒了.I began to doze off and pulled myself up sharp.我开始迷迷糊糊睡去了,立刻又惊醒过来.Some students often doze off in class.有些学生常在课堂上打瞌睡....