Astatide
砹化物
🗣️ 情景例句
OK, Philip. This is your third cup of coffee.
好啦 Philip。这是你第三杯咖啡了。
Do you like traveling?
你喜欢郊游吗？
Officials from Greenwich Observatory have the clock checked twice a day.
格林尼治天文台的官员们每天两次派人矫正此钟。