在设备自由放任，重要的是要保持警觉，因为你永远不知道什么可以高速驾驶的。

At Maker Faire, it's important to keep alert, as you never know what might drive by at high speed.

youdao

要波动的更自由些， 保持你的手与肩膀同宽。

To undulate more freely, keep you hands about shoulder width apart.

youdao

了解为什么要保持在万圣节手电筒在这个自由安全视频在门口。

Learn why to keep a flashlight at the door on Halloween in this free safety video.

youdao