她轻轻转动舵柄，让小船改变了方向。

She turned the ___tiller slightly to change the boat's direction.

这位农夫每天在田里辛勤劳作。

The ___tiller works hard in the fields every day.

小麦底部又长出了几个新分蘖。

Several new ___tillers have grown at the base of the wheat plant.