If you consider that she's only been studying English a year, she speaks it very well.
你可以考虑到她那学一年的英语,她的英语说得非常好。
The second marks the arrival of transverse vibrations which travel more slowly and arrive several minutes after the first.
然后记录下的是横向波的到达,横向波比纵向波传播得慢,在纵向波到达几分钟后才能到达。