单词cat door
na.: 猫门
网络: 猫洞
（门下供家猫进出的）活动板猫洞:
a hole cut in the bottom of the door to a house, covered by a piece of plastic that swings, so a pet cat can go in and out
猫门〔板壁等上供猫出入的小门〕
But the owner of the third house says she knows how did they get into her house: through the tiny 7 inches wide cat door!
而第三个邻居清楚他们是怎么做到的：他们从门上仅仅7英寸宽的猫洞钻进钻出！