Prodag
半胶态石墨悬浮液
🗣️ 情景例句
Where do I board my plane?
我在那儿登机？
It's an air-conditioner.
这是空调。
'Whatever are you doing up here Bill?' asked the vicar in surprise.
“你究竟在这上面干什么，比尔？”牧师惊讶地问。