1. 不利条件;劣势;不便之处
    A disadvantage is a factor which makes someone or something less useful, acceptable, or successful than other people or things.

    e.g. His two main rivals suffer the disadvantage of having been long-term political exiles...
           他的两个主要竞争对手因长期政治流亡而处于不利的地位。
    e.g. ...the advantages and disadvantages of allowing priests to marry.
           允许神父结婚的利与弊

2. 处于不利的境地
    If you are at a disadvantage, you have a problem or difficulty that many other people do not have, which makes it harder for you to be successful.

    e.g. The children from poor families were at a distinct disadvantage...
           来自贫困家庭的孩子们处于明显的不利地位。
    e.g. England's players would be left at a disadvantage against those of the rest of the world.
           英格兰运动员与世界其他地区的运动员相比将处于不利境地。

3. 对…不利
    If something is to your disadvantage or works to your disadvantage, it creates difficulties for you.

    e.g. A snap election would be to their disadvantage...
           提前选举将对他们不利。
    e.g. Depression is the third thing that works to my patients' disadvantage.
           抑郁是威胁我的病人健康的第三大杀手。