Operation for heel spur removal is needed while necessary.
如需要,医生会为患有后跟骨刺患者进行手术。
The maintenance of a large inventory, while necessary, is not advantageous for many reasons.
虽然是必须的,但是由于许多原因,大库存的维护是不利的。
The willingness to spend money to try to contain conflicts around the world, while necessary and admirable, is not enough.
花钱的意愿本是在必要时去在世界范围内控制冲突,而仅有钦佩是不够的。
That it was necessary to stop - for a while - all payments in gold or silver.
VOA: special.2009.01.01
Why? Because good will and idealism, while necessary,they are not sufficient.
为什么呢?因为美好的意愿和理想主义,虽然必要,但却是不够的。
Farmers know that it is necessary to make hay while the sun shines.
VOA: special.2010.01.31
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