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PFD - Personal Flotation Device;a life preserver. Position Finding Device,位置测定位，测位仪[器];
In case of a water landing, you may be used as a flotation device. 由于要在水上降落,你可能要被。
In the unlikely event of a water landing, your seat cushion may be used as a flotation device. 如飞机降落在水中，您的坐垫可用作救生器械;但这种情况不太可能发生。
The air-sparged hydrocyclone has been used as a centrifugal flotation device since it was invented in the 1980s. 充气水力旋流器自从问世以来,一直被当作离心浮选设备来研究和使用。
SAFETY FIRST: Since you will be by water, all children should wear a life preserver (PFD or Personal Flotation Device). 安全第一.;只要在水边;孩子们都应该穿上救生衣
The man, who has not been identified, is believed to be the first person to survive a drop over the falls without any life jacket or flotation device. 这个不明身份的男子被认为是世界上第一个没有借助任何救生衣和浮游装置跳入尼亚加拉瀑布后生还的人。
A stroller, for example, keeps a toddler safe at a crowded theme park; a Coast Guard-approved flotation device is literally a lifesaver for children around water. 例如：在一个拥挤的主题公园里用儿童车推着刚刚会走路的孩子才能保证安全，对于在水边玩的孩子来说，海岸警备认可的漂浮设备才是严格意义上的救生者。
Several flotation devices in the swimming pool at a crime scene float in this shape. 在犯罪现场的游泳池里,一些漂浮着的水管设备形成了这个形状。
However, toy versions of life jackets or flotation devices like "water wings" do fall within the CPSC's jurisdiction. 不过，玩具版的救生衣或漂浮装备，如“浮水圈”，需要符合美国消费品安全委员会(CPSC)的法规要求。
Additionally, flotation devices including rings and armbands should not be used in the bath to ensure the safety of your baby. 此外，在沐浴中不应使用漂浮装置包括吊环和臂章以确保你宝宝的安全。
They sing by striking their flippers against their chests to hit their pharyngeal pouches, balloon-like extensions of the trachea that are unique to Odobenus and that also serve as flotation devices. 牠们用鳍拍胸膛，打击咽囊，也就是气管的延伸，状似汽球，是海象独有的特徵，同时也有漂浮的作用。
New Flotation Device--Flotation Column's Characteristics and Its Superiority 新型浮选装置--浮选柱的特征及其优势
A display device that uses a cathode ray tube. 一种使用阴极射线管的显示装置。
If took ten men to wrestle the device into place. 用了10个人才把那台装置挪动到位。
A device used to modulate an electromagnetic wave. 调制器用以调制电磁波的装置
She got the information by some device. 她运用某种手段获取了情报。
This is a device for squaring the circle. 这是一个不可能实现的方案。
Let's put the new device to the test now. 现在让我们现在来试验这部新装置。
The data logger device has been fitted to ship's engine room. 数字记录仪装置已安装在船只的机舱里。
The device had undergone extensive testing. 这种装置经受过广泛的试验。