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...
The rich districts can outbid the country school for teachers.富裕地区能以高薪从乡村聘走教员.The custom still obtains in some districts.这种风俗在某些地方仍然流行.Our municipality is divided into ten districts.我们这个市,下面设10个区....