Dimorphostroma
双形叠层石
🗣️ 情景例句
With great tact, Lily said that it was time for her to go.
莉莉机智地说她该走了。
How ofter did I tell you to sit straight?
我告诉你多少次要坐正?
No spitting on the street.
禁止在大街上吐痰。