Xerogel
干凝胶
🗣️ 情景例句
Good-bye, Mr. Carlson. Thanks.
再见， Carlson先生。谢谢。
What would you like to do this weekend?
这周末你打算做什么？
Could we see the specifications for the X200?
我们可以看一下X200型的详细规格吗？