Striker Alan Smith was guilty of two glaring misses.前锋艾伦·史密斯两次严重失误，将球射偏。Kate had invited Alan to spend the Passover with her.凯特已经邀请了艾伦和她一起过逾越节。Alan was irritable, and very evidently in a nervy state.艾伦很急躁，很明显他处于紧张不安的状态。...
In experimenting we find out that sound travels with different velocities through different substances.在实验中,我们发现声音以不同的速度通过不同的物质而传播.A gas in thermal equilibrium has particles of all velocities.处于热平衡的气体,其粒子有一切速度.At high ga...