Schoolteaching
n. 授课, 教师职务
✅ 同义词
🗣️ 情景例句
before the guests arrive.
在客人到达之前。
Every tide hath its ebb.
兴盛之日必有衰退之时。
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。