软式充填氦气的飞船主要是由桑托斯- 杜蒙特 发展改进.The nonrigid helium - filled Blimp was principally developed by Alberto Santos - Dumont ( 1873 - 1932 ) .历史人文类型: 杜蒙(Dumont)和阶序.Historical human types: Dumont and hierarchy.由于不慎选择候选人的不慎言论,杜蒙在竞选过...
To keep your bearings in a desert sandstorm is impossible.在沙漠的尘暴中要想保持方位感是不可能的.With the aid of a compass the traveler can find his bearings.藉助罗盘,旅行者可以找到自己所处的方位.A sightseeing tour of the city is included to help you get yo...
In the 19th century, inbreeding nearly led to the extinction of the royal family.19世纪，近亲婚配几乎导致皇室宗族灭绝。Endodeme is a deme composed of predominantly closely inbreeding but dioecious individuals.同系同群种是由近亲繁育占优势,但雌雄异株的个体组成的同群种...