I learned how to save a friend if he is drowning. I would throw him a rescue tube and then pull him back in with a rope.
我学会了怎样救溺水的朋友。我会扔给他一个救生圈，然后用绳子把他拉上岸。
Rescue tube
原声例句
VOA Standard 2014年12月合集
英语百科
Rescue buoy
（重定向自Rescue tube）
A rescue buoy or rescue tube is a piece of lifesaving equipment used in water rescue. This flotation device can help support the victim's and rescuer's weight to make a rescue easier. It is an essential part of the equipment that must be carried by lifeguards. It further can act as a mark of authority, identifying an individual as a lifeguard.
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