Nabf
[体]全国业余棒球联合会
🗣️ 情景例句
Hello, Mr. Maxwell.
哈喽， Maxwell先生。
My little brother takes a bath before he goes to bed at night.
在他晚上睡觉以前，我的弟弟要洗一下澡。
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。