一旦军事行动的必要性不复存在，军队就必须撤出。

As soon as the necessity for action is over the troops must be withdrawn

对改革的必要性已经达成了共识。

There is agreement on the necessity of reforms

她拒不承认改革的必要性。

She refuses to acknowledge the need for reform.

我仍怀疑改革的必要性。

I remain unconvinced of the need for change.

需要使人们明白建立一个新体系的必要性。

People need to be satisfied of the need for a new system.

艾森豪威尔深谙长远规划的必要性。

Eisenhower was intensely aware of the need for long-range planning.

总统谈到了在领土问题上达成和解的必要性。

The President spoke of the need for territorial compromise.

改革的必要性由于银行利润的暴跌而凸显。

The need for change has been dramatized by plummeting bank profits.

我已使他们深刻认识到提高专业素养的必要性。

I've impressed upon them the need for more professionalism