1. Then too, the triangle is one of only two places on earth where a compass needle points to true north rather than magnetic north, causing problems in navigation.
    除此之外，此三角是地球上惟一的两个罗盘指针指向真正北方而不是磁极北方的地段之一，这就造成了航行上的麻烦。

2. Navigation is difficult on this river because of the hidden rocks.
    由于多暗礁, 在着条河里航行很困难.

3. Stalin said that if he understood the question rightly, he was in favour of assuring free navigation to and from the Baltic Sea.
    斯大林说如果他对此问题的理解是正确的话，那么他赞同保证波罗的海过往船只自由通航。

4. Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.
    100年前，我们只知道海洋是二维平面形的，以及靠近陆地浅水区的深浅不一能给航行带来危险。