watercraft

manatees struggle for survival as the result of a gantlet of threats, from watercraft strikes to toxins in the water.

海牛（正）经受各方面威胁的考验，从水上船只的骚扰到水下毒素。

A jet propulsion model was designed and the structural dimensions of its reaction chamber and jet nozzle were determined referring to the operating principle of the jet engine in the exploration and investigation of the newfashioned propulsion for the watercraft.

在舰船用新型推进器的研究和探索中，依据火箭喷气式发动机的工作原理，设计了一种喷气式推进模型，并确定了推进模型反应室和喷嘴的结构尺寸。

Embedded computers have been applied in many fields of manufacturing, such as process control, communication, automobile, watercraft, aviation, spaceflight, military equipment and consuming products, etc. It provides us a good chance for the development of micro-embedded GIS software.

制造工业、过程控制、通讯、汽车、船舶、航空、航天、军事装备、消费类产品等都已成为嵌入式计算机的应用领域，给微型嵌入式GIS软件的研究与发展提供了良好的机遇。