manual simulation

例句：

1. 1. In this manual simulation, we will practice the basic skills of operating a machine tool.
   在这个手动模拟中，我们将练习操作机床的基本技能。
2. 2. The manual simulation helps us to understand the working principle of the device before we actually use it.
   手动模拟帮助我们在真正使用设备之前了解其工作原理。
3. 3. The manual simulation is an excellent way to learn how to operate complex machinery without risking personal injury.
   手动模拟是一种极好的方式，可以在不冒着个人受伤风险的情况下学习如何操作复杂的机械设备。