step strobe marker

例句：

1. 1. The chef demonstrated how to make a perfect pancake by following the proper steps.
   厨师演示了如何按照正确的步骤制作完美的煎饼。
2. 2. She carefully followed the instructions on the instruction manual before starting her project.
   她在开始她的项目之前仔细地阅读了说明书上的说明。
3. 3. The children were instructed to take turns stepping onto the platform.
   孩子们被指示轮流走上平台。