有很多种方法可以穿越大海。

There are lots of ways to travel across the sea.

来拉他们的雪橇穿越冰冻的北极。

To pull their sledges across the frozen Arctic.

即使有GPS的帮助，我们还是迷路了几次，但最终我们成功穿越了落基山脉。

We got lost a few times even with the help of GPS, but eventually we managed to cross the Rocky Mountains.

昌跋涉了四十九天，穿越沙漠和山脉。

For forty-nine days Tchang trudged across deserts and over mountains.

二十七年来，乘客乘坐这架飞机穿越大西洋。

For twenty-seven years, passengers travelled across the Atlantic Ocean on this plane.