Older watercrafts , like dugout canoes , have been foundthroughoutthe world , but these are the oldest seagoing ships . moresignificantly , the next - oldest ships ever discovered in egyptare700 years younger , ward told livescience in atelephoneinterview 更重要的是，世界上第二古老的船只也是在埃及发现的，但其年代却比这些船只晚了700年。
Boats and other types of watercraft , including things like jet ski ? , surf boards , canoes , etc . , are constantly exposed to water whether they are being used , or even out of the water as they are still exposed to high humidity climates 游艇和其他种类的船只，包括那些滑雪板、冲浪板、独木舟等，都是经常裸露在水上，它们是否要用或经常放置在潮湿的环境中。
The products mentioned are widely used in such fields as machinery , automobiles , aviation , watercrafts , railway locomotives , switch devices , elevators , air - conditioners , construction , cases and bags , furniture , kitchen , leisure articles , etc 公司产品广泛应用于机械、汽车、航空、船泊、铁道机车、配电开关装置、电梯、空调、建筑、箱包、家俱、炊具及休闲用品等领域。
Many credit the french for being the first to use inflatable kites with water skis and other watercraft , and advances in kite technology in the 1980s have helped the sport become more popular among people of all ages 很多人认为，法国于1980年代首开先例，结合利用充气型风筝和滑水橇及其它水上体育用品，和风筝技术的优点，使得这项运动越来越在各个年龄层次的人中间广泛流行。
At the same time with the development of mordern technology , watercraft steer automatization comes true . the " non - paper plotting " that mark by pc instead of by human , can decrease the cost of hardware and 同时现代科学技术的发展，使船舶驾驶自动化逐渐成为现实， “无纸化”的人工标绘，即刚计算机软件模拟标绘的过程，在人机交互的界面下进行雷达标绘训练，有利于减少硬件的投资。
It is one of the requirements of product ' s form in the computer - aided design of aircraft , automobile , watercraft and household appliances , etc . however , most of methods adopted in the fairness are the methods applying on parameter surface “光顺”是个工程上的概念，不同于数学上的“光滑” ，是在飞机、汽车、船舶以及家电等的计算机辅助设计中，人们对产品外形的多方面的要求之一。
Polyphosphazenes are a relatively new type of inorganic polymer , serving as potentially useful candidates for being applied to fields of aviation , watercraft fabrication , petrochemicals and biomaterials due to their particular structure and unique characters 摘要聚磷腈是一类新型的无机高分子，具有特殊的结构和有机高分子难以比拟的特性，已应用于航天航空、船舶制造、石油化工及生物医学等领域。
In the end the predicting model is used in watercraft motion modeling and predicting , and the auhor analyzes the result of simulating . the result indicates that this ap $ j $ ifgx9 @ 1 % & itx means is reasonable and feasible and gains the satsfactory pmpose 最后将此模型应用于舰船纵摇运动的极短期预报，并从统计理论的角度对仿真结果进行了分析，分析结果表明该方法是合理可行的，确实提高了预报精度，加长了预报时间。
Guests can board one of the experimental watercraft and embark on a twisting , whirling , wild ride through a labyrinth of fountains , rock formations and whirlpools . the center for weather control usually uses this facility for testing out new types of navigation systems 3人搭乘的水上逗趣船，四周环绕著试验用的作品如旋涡岩石喷泉等，宛如闯入迷宫一般,一会儿突然改向行驶一会儿突然团团转，行驶方向完全无法预测！
2 . based on the scheme of modeling and predicting of neural network , the auhor select a neural network model which is applicable to watercraft motion short time modeling and predicting according to the character of watcrcraft historical data 围绕着基于神经网络的建模与预报方案，在对不同的神经网络模型进行研究的基础上，根据舰船运动历史数据的特点，对神经网络模型进行了筛选，选择适合舰船运动极短期建模与预报的神经网络模型。
