oar

彰化縣和美鎮和美高中

An oar is a long pole that you can use to propel a boat through the water. 

槳是一根長竿，用來讓船在水中前進。

These students are using oars to row their boats around a large indoor swimming pool. 

這些學生用槳在大型室內游泳池划船。