Optional switched channel
[计] 任选开关通道
🧩 词语组成解析
a. 转换的
🗣️ 情景例句
Why does it have to be one or the other?
为什么非得有这个就没有那个？
Close your book,please.
请把书合上。
However, there is an even more insidious kind of pollution that particularly affects urban areas and invades our daily lives, and that is noise.
但是，还有一种更加隐蔽有害的污染，它专门影响城镇地区，侵袭我们的日常生活，那就是噪音。