Moving at such speeds, navigation becomes critically important.在如此快的速度下行驶, 导航极为重要。

useful developments in navigation航行学中的有益进展

Pack ice around Iceland was becoming a threat to navigation.冰岛附近的大块浮冰曾对水上运输构成威胁。

The export of coal via the new navigations soon became an even more important trade.不久之后, 通过新运河出口煤炭就成为一项更为重要的贸易活动。

Navigation of the website is easy with a user-friendly help guide.有易学易用指南的帮助, 网站浏览就容易多了。