cet6六级作文结构分析：
paragraph 1
growing population — more fish — rapid development of commercial fishing — gradual extinction of species of fish
dangerous tendency:
1990 — fishes many, boats few
1995 — boats many, fishes few

paragraph 2
intention of the drawer:
warning people
prot ection of fish species

paragraph 3
suggestions:
lay down laws
encourage artificial propagation
self-discipline

来源:可可英语 http://www.kekenet.com/cet6/201906/587193.shtml