Nitrum
[化] 天然碱
🗣️ 情景例句
You are a walking dictionary.
你是活字典。
What kind of work do you do? Are you a salesman?
你做什么样的工作？ 你是一售货员吗？
and mechanical systems like a wound watch, or the sun,
像上紧发条的手表那样的机械装置，或太阳，