妈妈,我们谈话时你不必陪着.Mommy, you don't need to stay while we talk.他谈话时,一架军用喷气式飞机在镇子上空呼啸而过。As he talked, an airforce jet screamed over the town.创作这本书的想法来源于跟菲莉帕·布鲁斯特的谈话。The idea for this book grew out of conversations with Ph...
一些蝙蝠已经把用于发出回声定位叫声的结构专门化了.Some bats have specialized structures for emitting echolocation calls.“啊, ”叫声的回音.AAAAAAAAAAAAAHHHHHHH, the scream echoed.因此,小波分析是分析蝙蝠回声定位叫声的一种有效的新途径,有其广泛的应用价值.DWT is testified to be a new effecti...