求翻译：首先，当我们从房间里出来时，我们要及时关住灯；其次，当我们外出时，我们最好骑自行车，因为，自行车很环保；最后，我们要节约资源。是什么意思？

First, when we came out from the room, we have to include lights in a timely manner and, secondly, when we go out, we'd better by bike, because the bike is very environmentally friendly and, finally, we need to conserve resources.