They will be selected out by competition; the analogy is to natural selection in biological evolution.
他们会被竞争所淘汰；如同生物进化中的自然选择。
2
There are as well as density-dependent biological factors such as disease, predation, and intraspecific competition .
还有密度制约的生物因素，诸如病害、捕食和种内竞争等。
3
But undergraduates are already making extensive use of standard biological parts, through the annual International Genetically Engineered Machine competition launched in 2005.