因为window是窗户的意思，加s就是窗户的复数: windowsWindows are usually sealed off.
窗户通常是封闭的。
The sun glinted on the windows.
太阳照在窗户上闪闪发光。
She rolled up all the windows.
她摇上了所有的窗户。
The windows had frosted over.
窗子结满了霜。
The rain lashed at the windows.
雨点猛烈地打在窗户上。
