Sonac
超声传感器
🗣️ 情景例句
This has been a great learning experience for us, Marilyn.
这对我们是一次很好的学习经验， Marilyn。
By doing we learn.
经一事，长一智。
In 1898 a law was passed which meant that all people above a certain age were paid a weekly old-age pension.
1898年通过了一项法令，规定一定年龄以上的人全都可以按周领取"老年养老金。