advice作“劝告”解时是抽象名词,不可数,表示数的概念时须借助表示单位的名词piece。advice作“消息,报导”解和在商业用语中作“通知单”解时是可数名词,且常用复数。

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Such advice as he was given has proved almost worthless.

他所得到的那点建议结果证明几乎完全没用。

What advice would you proffer to someone starting up in business?

您对初入商界的人有何建议？

The emergency services were on hand with medical advice.

随时都有急诊服务，并提供医疗咨询。