Oros
渗透泵缓释剂；光学只读存储器
🗣️ 情景例句
What happened?
发生了什么事？
To have a nice dream
做了个好梦
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。