Background density
[计] 背景密度
🧩 词语组成解析
🗣️ 情景例句
What a downpour!
下得可真够大的！
A book is the same today as it always was and it will never change.
一本好书今天如此，将来也如此，永不改变。
This may sound fantastic, but it is easily calculated.
这点听起来令人难以置信，但却很容易计算出来。