1.
The storms had caused difficulties in the navigation of the plane.
风暴造成飞机航行的困难。
2.
Navigation is difficult on this river because of the hiding rock
因为有暗礁,在这条河上航行很困难
3.
Navigation is difficult on this river because of the hide rock.
因为有暗礁,在这条河上航行很困难。
4.
The North Atlantic was difficult to travel. There were bad storms.
北大西洋航行困难，时有强风暴发生。
5.
sail against the wind
顶风航行，在困难情况下工作
6.
Navigation is difficult on this river because of hidden rocks.
由于多暗礁, 在这条河上航行很困难。
7.
Although the river is navigable all the year round, navigation is difficult because of the rocks.
虽然此河终年可通航，但由于礁石多，航行困难。
8.
They did not trouble to train the ordinary bomber pilots in the difficult art of navigation.
他们没那样费事去训练一般的轰炸机驾驶员掌握困难的航行艺术。
9.
A lot of difficulties attended upon Simon's single-handed voyage across the Atlantic.
西蒙在独自横跨大西洋的航行中遇到了许多困难。
10.
It's hard to pilot a boat in rough waters.
在有风浪的海面为船领航是很困难的。
11.
The worst part of the ocean transit is now over
远洋航程里最困难的一段已经过去了
12.
The worst part of the ocean transit was now over.
远洋航程里最困难的一段已经过去了。
13.
It's hard to pilot a vessel in rough weather.
在大风浪中为船舶引航是很困难的。
14.
Many difficulties and dangers attended upon his single-handed voyage round the world.
他独自一人作环球航行，遇到了很多困难和危险。
15.
Navigation is difficult on this river because of the hidden rocks.
因为河上有暗礁，所以在这条河上航行很困难。
16.
A program that is tough but doable.
困难但是可行的方案
17.
His left foot hurt so badly that he could barely walk.
他的左脚剧痛难忍导致行走困难。
18.
uncountable difficulties
无数的难题[困难]