The greatest value of drone technology is that it can reach places that are difficult for humans to access.
孩子们从来都不太擅长听长辈的话,但他们从未停止模仿长辈。
The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown.
The real and effectual discipline which is exercised over a workman is that of his customers.