$('#result').append(
 'There are <b>' + basket.count + '</b> ' +
 'items in your basket, ' +
 '<em>' + basket.onSale +
 '</em> are on sale!'
);

$('#result').append(`
 There are <b>${basket.count}</b> items
  in your basket, <em>${basket.onSale}</em>
 are on sale!
`);

var x = 1;
var y = 2;

`${x} + ${y} = ${x + y}`
// "1 + 2 = 3"

`${x} + ${y * 2} = ${x + y * 2}`
// "1 + 4 = 5"

var obj = {x: 1, y: 2};
`${obj.x + obj.y}`
// "3"
function fn() {
 return "Hello World";
}

`foo ${fn()} bar`
// foo Hello World bar

// 变量place没有声明
var msg = `Hello, ${place}`;
// 报错
`Hello ${'World'}`
// "Hello World"