| 单词 | essential communication | 
| 释义 | essential communication It has sea going capabilities and all of the essential communication and navigation equipment.  Retrieved from Wikipedia CC BY-SA 3.0   The vessels are sea-going and have all of the essential communication and navigation equipment.  Retrieved from Wikipedia CC BY-SA 3.0   It has seagoing capabilities and have all essential communication and navigation equipment.  Retrieved from Wikipedia CC BY-SA 3.0   Early monastic communities evolved simple hand signing for essential communications.  Retrieved from Wikipedia CC BY-SA 3.0    | 
	
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