在html中，通过<p>来展现段落
<!DOCTYPE html> <html> <head> <title></title> </head> <body> hello world! <p>Estimating the number of species in a community is a classical problem in ecology, biogeography, and conservation biology, and parallel problems arise in many other disciplines. This research topic has been extensively discussed in the literature; see Bunge and Fitzpatrick (1993), Seber (1982, 1986, 1992) for a review of the historical and theoretical development. In a subsequent paper, Bunge, Fitzpatrick and Handley (1995) also compared three principal frequentist procedures using simulation results. Ecologists and other biologists have long recognized that there are undiscovered species in almost every survey or species inventory.</p>hello world </body> </html>
效果如下：
可以看到，在段落的前后，自动加入了空行。