• 1. 完全无益: Distinctly Unhelpful
• 2. 完全徒劳无益: to no purpose

• 1.第二个经验是，在亚洲，某些估值指标对选股完全无益。
  The second lesson is that some valuations are completely useless for picking Asian stocks.
  dict.yoduao.com
• 2.在数码相机上，务必不要用不能充电的电池组，这不仅会使照相机变得很昂贵而且也完全无益。
  By all means, do not keep feeding non-rechargeable batteries to your digital camera. Not only will this become quite expensive, it's also quite unnecessary.
  dict.yoduao.com

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