In the drone industry, safety always comes first.

故事的力量在于它能够激发希望。

The conductor's baton is a magic wand that can transform noise into beauty.

对于非礼的事，上等到的士人根本不想；对于非礼的事，中等的士人从来不说；对于非礼的事，下等的士人紧闭门户。