使用 Node.js 的 for-await-of 循环遍历返回的数据流，并对每个对象执行 GetObjectCommand。以下是一个示例代码：

const { S3Client, GetObjectCommand } = require("@aws-sdk/client-s3");
const { Readable } = require("stream");

const s3Client = new S3Client({ region: "us-east-1" });
const objectKeys = ["object1", "object2", "object3"];

async function getAllObjects() {
  const objects = [];
  for await (const key of objectKeys) {
    const getObjectParams = { Bucket: "myBucket", Key: key };
    const objectStream = await s3Client.send(new GetObjectCommand(getObjectParams));
    const buffer = await streamToBuffer(objectStream);
    objects.push(buffer.toString());
  }
  return objects;
}

function streamToBuffer(stream) {
  return new Promise((resolve, reject) => {
    const chunks = [];
    stream.on("data", (data) => chunks.push(data));
    stream.on("end", () => resolve(Buffer.concat(chunks)));
    stream.on("error", reject);
  });
}

getAllObjects().then((objects) => console.log(objects));