C 席子，垫子piece of material, made of straw, rushes, fiber, etc, used to cover part of a floor

　exercise ～　（体操或摔跤用的）海绵垫
　leave sb on the ～　拒绝接待某人

　I bought a straw mat yesterday.　我昨天买了一张草席。
　Put the hot dish down on the mat, so you won't burn the table.　把盛热菜的盘子放在垫子上，免得烫坏桌子。

1. vt.给…铺上席子　 to make a piece of rough strong material for covering part of a floor.
2. vi.缠结　 to make together

　～ the bed　给床铺上席子
　～ together　缠绕在一起
　～ up seedlings　把幼苗用草席盖起来

　Mother told me to mat the bed.　妈妈要我给床铺上席子。
　They didn't ask you to mat the room, understand?　他们没有让你往房间里铺席子，明白了吗?
　The room is matted.　这屋子被铺上草席。
　He lives in the matted room in summer.　夏天，他住铺席子的房间。
　She is combing her matted hair.　她正在梳理她那乱蓬蓬的头发。

 ♣ mat together　(v.+adv.)
　缠绕在一起　make together
　The weeds matted together.　杂草缠绕在一起。
 ♣ mat up　(v.+adv.)
　用草席盖起来　cover sth with a mat
　She matted up seedlings　她把幼苗用草席盖起来。