Many parts in batteries are unique and rarely dual-sourced, so the industry has several weak points in the supply chain and the potential for massive shortages if any one part is unavailable.

电池的很多组件都是独一无二的，很少有第二家来源，因此业界的供应链有一些弱点，如果这些元件中的任何一样供应不足都有可能造成严重的短缺。

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Remote User's Part Unavailable.

远端用户部分无效。

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Having fun together is a key part of building relationships, and it also provides youth with valuable opportunities that are otherwise often unavailable to them.

与对方一起玩耍是建立联系的关键部分，并且它为年轻人提供了非常有价值的机会，很可惜，这种机会现在常常在他们的生活中难以获得。

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The Tory candidate had been criticised by some political rivals for being unavailable to take part in a BBC 5 Live election debate earlier.

BBC: Eastleigh by-election: Cameron defends Maria Hutchings

"We have apologised for the inconvenience caused and are arranging to fit a new boiler tomorrow, at no charge, as the part needed is still unavailable, " a spokesperson said.

BBC: Pensioner left without hot water gets free boiler

And the measure of unemployment that takes into account people who have stopped looking for work but still want a job, as well as those working part-time because full-time work is unavailable, increased to 16.5%.

FORBES: Jobs Report Nice But Nasty Wildcards Remain In The Deck