他给他演示如何吹奏象牙吹口乐器。He showed him how to blow into the ivory mouthpiece.象牙海岸成为世界上可可粉的主要产地。The Ivory Coast became the world's leading cocoa producer.象牙磨损的速度快于生长的速度。Elephants wear the tusk down faster than they can grow i...
文中分析了嘉陵江流域洪灾具有普遍性 、 频繁性 、 季节性 、 破坏性、复合性的特点.He holds that the Jialing River Basin's flood has five characteristics: universality, frequency, seasonality, destructiveness and complexity....