a cat还有什么含义

　　He made a frightened noise a little like the miaow of a cat.

　　他发出了一个吓人的声音，有点像猫在叫唤。

　　A robotic lawn mower will run over a neighbor's cat.

　　机器人割草机可能会碾过邻居家的猫。

　　It was described as a large, luxury mobile home, but there was barely room to swing a cat.

　　那个活动房被形容为宽敞豪华，可事实上几乎连转身的地儿都没有。