Ultraphonics
超声学
🗣️ 情景例句
and when I'm ready to go back,
而当我准备好要回去时，
If you have no questions, may I go on to the next stage?
如果你们没有问题了，我可以进行下一阶段吗？
That is our peak season.
下个月是我们的旺季。