如何使用google maps API使用多个纬度和经度来查找总行程

<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places"></script>

<div id="map"></div>

var map = new google.maps.Map(document.getElementById('map'), {
  center: {lat: 37.7749, lng: -122.4194}, // 设置地图的中心点
  zoom: 12 // 设置地图的缩放级别
});

var directionsService = new google.maps.DirectionsService();

var request = {
  origin: {lat: 37.7749, lng: -122.4194}, // 设置起点的纬度和经度
  destination: {lat: 37.3352, lng: -121.8811}, // 设置终点的纬度和经度
  travelMode: 'DRIVING' // 设置行程的交通方式，可以是DRIVING、WALKING、BICYCLING或TRANSIT
};

directionsService.route(request, function(result, status) {
  if (status == 'OK') {
    var totalDistance = result.routes[0].legs[0].distance.text; // 获取总行程距离
    var totalDuration = result.routes[0].legs[0].duration.text; // 获取总行程时间

    console.log('Total Distance: ' + totalDistance);
    console.log('Total Duration: ' + totalDuration);
  }
});