同根派生 英汉例句The rowers lost their rhythm and the boat lost speed.桨手们划桨的节奏乱了，赛艇因此慢了下来。We were winning the boat race until our boat went aground on a sand bank.我们就要赢得这次赛艇比赛时，我们的船突然撞到水下的沙洲，搁浅了。