彼は毎朝、庭でバットの素振りをしている。
He practices swinging his bat in the garden every morning.
剣道部では稽古の最初に素振りを百本行う。
The kendo club does a hundred practice swings at the start of training.
打席に入る前に二、三回素振りをした。
He took two or three practice swings before stepping into the batter's box.