名詞 navigation:

1. the guidance of ships or airplanes from place to place
   同義詞：pilotage, piloting
2. ship traffic
3. the work of a sailor
   同義詞：seafaring, sailing

1. Navigation is difficult on this river because of the hide rock.
   因?yàn)橛邪到?，在這條河上航行很困難。
2. The theory and practice of aircraft navigation.
   航空學(xué)飛機(jī)航行的理論與實(shí)踐
3. The compass is an instrument of navigation.
   羅盤(pán)是航行儀器。
4. Navigation is difficult on this river because of the hidden rocks.
   因?yàn)楹由嫌邪到?，所以在這條河上航行很困難。

nav.i.ga.tion

n.Abbr. nav.（名詞）縮寫(xiě) nav.
The theory and practice of navigating, especially the charting of a course for a ship or an aircraft.
航行術(shù)：航行的理論或?qū)嵺`，尤其是船或飛行的航行圖
Travel or traffic by vessels, especially commercial shipping.
海上交通：海土交通或航運(yùn)業(yè)，尤其指商業(yè)運(yùn)輸

【引伸】
nav.iga.tional
adj.（形容詞）