Superconductors only work at extremely low temperatures, rendering them practically useless because the energy used to cool them to those temps cancels out the benefit of no energy loss.

超导体只在极低的温度下发挥作用，几乎可以认为它们没什么用，因为那些用于将它们降到极低温度所消耗的能量抵消了其不产生能量损失的优势。

youdao

Chetty realised that unemployment benefit does not merely pay people to stay out of work; it also protects them from having to rush into an unsuitable job.

切迪认为，失业救济不仅为失业者提供了收入，同时使他们免于匆忙从事一份不合适自己的工作。

youdao

It also allows you to benefit from the work done by other designers, so you don't have to learn the hard lessons of design ideas that don't work out.

它还使您可以从其他设计者完成的工作中获益，因此无需从失败的设计理念中吸取教训。

youdao

The number of people out of work and claiming benefit totalled 135, 200 in October - a rise of 500.

BBC: Scottish jobless rate increases

The Department of Work and Pensions maintains it is making an out-dated benefit much clearer.

BBC: Walking stick

The Department of Work and Pensions maintains it is making an out-dated benefit much clearer, and that broadly the same number of people will be entitled to extra mobility help.

BBC: Man's hand on wheelchair