km/h. (一架直升机大概每小时飞200公里。)(转身去看地图。)The distanbsp;from Vancouver to Princess Royal Isnd is about 600 kilometers. So, it takes about 3 hours one way. (从温哥华到公主岛的距离大概是600公里。那么，单程就要3个小时。)
胡杨：Then it is 6 hours for a round trip. And we want the aircraft waits there for 4 hours. (那么来回就是6小时。我们还要飞机在那里等4个小时。)
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