balance of power
1.N-SING 单数名词（竞争团体或国家间的）均势 The balance of power is the way in which power is distributed between rival groups or countries.
...changes in the balance of power between the United States and Europe.
美欧均势的变化
2.N-SING 单数名词（小政党能够使某一较大政党成为政府中多数派的）举足轻重的地位 If a small political party holds the balance of power in a government, it is able to give a larger party a majority by supporting this larger party.
The system of proportional representation has led to the minority parties continually holding the balance of power in the parliament.
比例代表制使得少数党在议会中频频拥有举足轻重的地位。
