trousers是單數還是復數

　　trousers相關例句

　　The trousers have double thickness knee panels for extra protection.

　　這條褲子上有雙倍厚的護膝片以加強保護。

　　These trousers are a bit tight.

　　這條褲子有點緊。

　　I was still in short trousers at the time.

　　我那時還在穿著短褲呢。

　　A wool jacket complements the silk trousers and provides an interesting contrast in texture.

　　毛料上衣配真絲長褲，質地上的差異非常有趣。

　　There were holes in the knees of his trousers.

　　他褲子的膝部有破洞。