let arr = []
        function sendPost(text){
            return new Promise((resolve)=>{                
                setTimeout(()=>{
                    arr.push({text,time:new Date()})
                    resolve(text)
                },1000)
            })
        }
        const text1=['a1','a2','a3','a4']
        const text2=['b1','b2','b3','b4']

想要的结果如下，是一次性输出text1再每隔一秒顺序输出text2(时间格式我简略了，这不是重点)，用promise的话怎么实现

arr=[ {text: "a1", time: 11:44:51},{text: "a2", time: 11:44:51},{text: "a3", time: 11:44:51},{text: "a4", time: 11:44:51},{text: "b1", time: 11:44:52},{text: "b2", time: 11:44:53},{text: "b3", time: 11:44:54},{text: "b4", time: 11:44:55}]