The world has two kinds of typical elephant - African elephants and Asian elephants.
有两种典型的象——非洲象和亚洲象。
Erosion characteristics of two kinds of typical aeolian soils in Horqin Sandy Land were studied using portable wind tunnel.
通过风洞实验，研究了科尔沁沙地两种典型风沙土的风蚀特征。
Then, the application features is predictad by applying it to two kinds of typical navigation problems for underwater instruments.
根据航海中现存的两个问题，指出参量阵在这方面的应用前景。
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