I know you don't understand but you will just have to accept my opinion this time.
我知道,你或许不能理解,但这次你必须接受我的意见。
Although being early may mean wasting a little time, this will be less than if you miss the train and have to wait an hour or more for the next one;
虽然早到可能意味着浪费一点时间,但这比误了火车等上一个多小时坐下班车浪费的时间要少,