Prodan
氟硅酸钠
🗣️ 情景例句
How has your visit to Shanghai been so far?
目前你对上海的印象如何？有何收获？
I don't think he will get here on time.
我不认为他会准时到这里。
because the environment that determines our evolution is no longer essentially physical.
因为决定我们进化环境的主要方面已不再是物质。