Pellidon
多孔聚酰胺膜
🗣️ 情景例句
I quite agree with you.
我很赞同你的看法。
You're very cheerful today.
你今天很快活。
When the instrument is situated at more than 700 miles from the earthquake centre,
如果把这种仪器安装在距震源700多英里远的地方，