Beacuse of the pollution,the c_____ coral reefs are dead and
Beacuse of the pollution,the c_____ coral reefs are dead and
请问what are the major threats to coral reefs?
Coral reefs under the ocean are___every colour,every size an
The scientist began to study the coral reefs eight years ago
I think the serious pollution is one of the c_____ for most
英语翻译People and the sources of air pollution are found in the
return of the dead and return of the 语法
Because of the water pollution,many fish have ___.die dead d
the day of dead
英文翻译Coral reefs provide shelters and food for nearly a quart
What are the bad effects of pollution?怎么翻译
_______majority of people are highly against the pollution i