The sheet, "sheet," is what goes over the bed - what covers the bed so that the bed does not get dirty. 床单（sheet）铺满整个床，盖在床上，床才不会脏。

　　When we say the sheets are matching we mean that the colors are the same or they are similar so they look good together.  我们说床单是配套的，意思是他们颜色相同或者相近，这样放在一起看起来比较协调。

　　Pillowcases, "pillowcases," (plural) pillowcases are what cover your pillows - what you put your head on when you sleep, that's called a pillow.  枕套（pillowcases）（复数形式）要包在枕头上，你睡觉的时候头要放在枕头上边。

　　So, the pillowcase goes over the pillow. 枕套就是包在枕头上的。

　　Lucy says she also has "a comforter made of goose down." 露西说她还有“厚鹅绒被子”。

　　A comforter is a thick blanket - a big blanket. "Comforter," a thick blanket. 厚被子（comforter）就是很厚的毯状物，也很大。

　　This comforter "is made of goose down." 这里的厚被子是“鹅绒”的。

　　Goose, "goose," down, "down," (two words). 鹅绒（goose down）由两个词组成。

　　A goose is a kind of animal. Down refers to the feathers of the animal, "feathers," the feathers.  鹅是一种动物。绒是指动物的羽毛（feathers）。

　　The feathers are the things that a bird has that covers its skin. 羽毛覆盖在鸟类的皮肤上。

　　They're usually long and very soft. So, goose down pillows or goose down comforters are considered very soft and they're very warm. 羽毛通常很长也很软。所以，大家都觉得鹅毛枕头或者鹅绒被子很软很暖和。