But now the men behind the ufos have revealed that they are radio - controlled models and that night flights are not just to shock people but also help sell the craft 神秘飛碟是用無線電操縱的那些夜晚出現(xiàn)的飛行器不僅是為了嚇唬人們,也是為了將他們
Servomotors , used in radio - controlled models cars , planes , etc . are useful in many kinds of smaller robots , because they are compact and quite inexpensive 用于無線電控制模型(汽車、飛機等)的伺服電動機在很多種較小的機器人中很有用,因為它緊湊而且相當便宜。
But now the men behind the ufos have revealed that they are radio - controlled models and that night flights are not just to shock people but also help sell the craft 但目前,導演這場ufo謎團的幕后人物終于現(xiàn)身,他們是阿里索?別霍鎮(zhèn)的心臟科醫(yī)生格倫?墨菲和工程師史蒂夫?津加利。
Beware of the danger flying radio - controlled model planes can be a rewarding and enjoyable pastime . however , such planes can also pose a serious safety problem to operational aircraft 操縱無線電控制模型飛機雖然是一項有趣的閑暇活動,但若操作失當,有可能導至民用或軍用飛機發(fā)生意外。