要实现Angular Universal 17的预渲染动态内容，可以按照以下步骤进行操作：

1. 安装Angular Universal 17：

   npm install @nguniversal/express-engine @nguniversal/common express
   

2. 创建一个Angular工作区：

   npx create-nx-workspace@latest
   

3. 在Angular工作区中创建一个Angular应用：

   ng generate application my-app
   

4. 安装Angular Universal 17依赖：

   ng add @nguniversal/express-engine
   

5. 创建一个服务端渲染的Express应用： 在根目录下创建一个文件server.ts，并添加以下代码：

   import 'zone.js/dist/zone-node';
   import 'reflect-metadata';
   import { enableProdMode } from '@angular/core';
   import { renderModuleFactory } from '@angular/platform-server';
   import * as express from 'express';
   import { readFileSync } from 'fs';
   import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader';
   
   enableProdMode();
   
   const app = express();
   
   const PORT = process.env.PORT || 4000;
   const DIST_FOLDER = join(process.cwd(), 'dist');
   
   const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main');
   
   app.engine('html', (_, options, callback) => {
     renderModuleFactory(AppServerModuleNgFactory, {
       document: readFileSync(join(DIST_FOLDER, 'browser', 'index.html')).toString(),
       url: options.req.url,
       extraProviders: [
         provideModuleMap(LAZY_MODULE_MAP)
       ]
     }).then(html => {
       callback(null, html);
     });
   });
   
   app.set('view engine', 'html');
   app.set('views', join(DIST_FOLDER, 'browser'));
   
   app.get('*.*', express.static(join(DIST_FOLDER, 'browser')));
   
   app.get('*', (req, res) => {
     res.render('index', { req });
   });
   
   app.listen(PORT, () => {
     console.log(`Node server listening on http://localhost:${PORT}`);
   });
   

6. 根据需要编辑angular.json文件，确保在构建过程中启用服务器渲染，例如：

   {
     "projects": {
       "my-app": {
         "architect": {
           "build": {
             "configurations": {
               "production": {
                 "fileReplacements": [
                   {
                     "replace": "src/environments/environment.ts",
                     "with": "src/environments/environment.prod.ts"
                   }
                 ],
                 "outputHashing": "all",
                 "sourceMap": false,
                 "extractCss": true,
                 "namedChunks": false,
                 "aot": true,
                 "extractLicenses": true,
                 "vendorChunk": false,
                 "buildOptimizer": true,
                 "fileReplacements": [
                   {
                     "replace": "src/environments/environment.ts",
                     "with": "src/environments/environment.prod.ts"
                   }
                 ],
                 "optimization": {
                   "scripts": true,
                   "styles": {
                     "minify": true,
                     "inlineCritical": false
                   },
                   "fonts": true
                 },
                 "outputPath": "dist/my-app/browser",
                 "index": "src/index.html",
                 "main": "src/main.ts",
                 "polyfills": "src/polyfills.ts",
                 "tsConfig": "src/tsconfig.app.json",
                 "assets": [
                   "src/favicon.ico",
                   "src/assets"
                 ],
                 "styles": [
                   "src/styles.scss"
                 ],
                 "scripts": []
               },
               "prerender": {
                 "fileReplacements": [
                   {
                     "replace": "src/environments/environment.ts",
                     "with": "src/environments/environment.prod.ts"
                   }
                 ],
                 "outputHashing": "all",
                 "sourceMap": false,
                 "extractCss": true,
                 "namedChunks": false,
                 "aot": true,
                 "extractLicenses": true,
                 "vendorChunk": false,
                 "buildOptimizer": true,
                 "fileReplacements": [
                   {
                     "replace": "src/environments/environment.ts",
                     "with": "src/environments/environment.prod.ts"
                   }
                 ],
                 "optimization": {
                   "scripts": true,
                   "styles": {
                     "minify": true,
                     "inlineCritical": false
                   },
                   "fonts": true