Leadagetest
密封试验
🗣️ 情景例句
Grandma, I bet you have a lot of stories to tell.
奶奶，我敢打赌你会说很多故事。
Don't be so sure.
话别说得太满。
It is only 380,000 kilometres away, and it has been visited by man already.
已经有人到过月球旅行了。