Pannexterna
外果皮
🗣️ 情景例句
Fine. Good-bye.
好的，再见。
Can I reconfirm by phone?
我可以用电话确认吗？
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。