personal flotation device是什么意思
时间:2025-12-27 21:10:46personal flotation device 常用
双语例句
(1)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。
双语例句
(1)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。