potassium
n[U]
chemical element, a soft shiny silvery-white metal occurring in rocks and in the form of mineral salts and essential for all living things 钾. =>App 10 见附录10.
🗣️ 情景例句
When can I photograph a class?
我何时才来上课呢?
A fox should not be of the jury at a goose's trial.
审鹅不应狐陪审。
Both of them are exciting. I like watching them. Are you good at sailing?