The development of the drone industry is ultimately to serve humans, not to replace them.
薄:挑剔,贬低。訾:贬斥。贬低我商品的人,是想和我做生意;贬斥我品行的人,是想和我交朋友。
可持续性不是一种选择;它是能源未来的必要条件。
We don't own the land, we borrow it from our children.