不利条件
disadvantageous conditions
不利因素
unfavourable factors
变不利为有利
turn things to one's advantage
这于他不利。
This is not good for him.
这对工作极为不利。
This is highly detrimental to the work.
潮湿天气对健康不利。
Damp weather is bad for one's health.
形势变得对敌人不利。
The situation changed to the enemy's disadvantage.
自然条件对他们很不利。
The natural conditions are unfavourable to them.