航行船只局限于小船，即使在短短夏季数月的无冰期，通行起来也足够困难。
Navigation was confined to shallow vessels, tricky enough even in the few summer months when the river was free of ice.
我们有很多困难的通行证。
没错，我们必须要克服困难，直到上下通行无阻。
首先，我认为当这些车辆行驶都缺乏一定的规则，并且当地的车速让我觉得穿越马路是一件很困难的事情，在加拿大步行者都有（优先）通行的权利，这意味这车辆必须为他们的通行而停止行驶。
At first I was uneasy crossing the roads here with the pace of the traffic and the seeming lack of rules. In Canada pedestrians always have the right of way, meaning cars must stop for them.
首先，我认为当这些车辆行驶都缺乏一定的规则，并且当地的车速让我觉得穿越马路是一件很困难的事情，在加拿大步行者都有（优先）通行的权利，这意味这车辆必须为他们的通行而停止行驶。
At first I was uneasy crossing the roads here with the pace of the traffic and the seeming lack of rules. In Canada pedestrians always have the right of way, meaning cars must stop for them.
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