“使漂浮”常见的英文表达是 “make float” 或 “cause to float” ,也可根据具体语境用 “keep...afloat”(侧重于让……保持漂浮、不沉没的状态 ) 。例如:
The wind made the leaf float on the water.(风使叶子漂浮在水面上。 )
The buoyancy device is designed to cause the object to float.(这个浮力装置被设计成能使物体漂浮起来。 )
We need to find a way to keep the boat afloat.(我们需要找到一个让船保持漂浮的办法。 )