第一churn vi.搅拌；搅动vt.搅拌；搅动1.Pour these fruits together and churn them three minutes.将这些水果倒在一起，然后搅拌三分钟。

2The waves churned and turned the boat over in an instant.海浪翻涌，瞬间把小船打翻。第二stir 搅动，搅拌，打动，激发The sections are then friction stir welded together .这些舱段部件随后用搅拌摩擦焊焊接在一起。In japan their views have caused a stir .在日本，他们的观点引起了轰动。Students are expected to stir campus protests .预计会有学生鼓动起校园内的示威。由此可见stir和churn指搅拌时意思相同，但stir在语义上更广泛，还有煽动,传播等意思.