對象屬性的讀取細節

let obj = {
    param:'參數Parma',
    'paramTwo':'參數Parma2'
}
let aaa = 'param';
let bbb = 'paramTwo'

obj.param;  //"參數Parma"
obj.aaa;   //undefined
obj.bbb;    //undefined
obj[aaa]   //"參數Parma"