ecologic problems

• 生态问题

ecologic problems的用法和样例：

例句

1. Forest entomologists have concentrated on ecological problems.
   森林昆虫学家所重视的是生态问题。
2. Sewage itself is another major contaminant of water that can cause ecological problems and such human diseases as cholera and dysentery.
   污水是引起水体污染的另一个重要因素，它会导致一些生态问题，使人引发霍乱和疟疾。