Could you ask her to give Doug a call when she gets back? She has my number.
她回来后,你能不能告诉她给道格挂个电话?她有我的电话号码。
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。