When I've been needed so much for such a long time, it's hard to step back and feel unnecessary.

在我被如此需要了这么长一段时间之后，很难退一步，并且觉得自己是多余的。

youdao

It is needed for string data types so DB2 knows how long the chain can grow.

对于字符串数据类型，DB 2需要通过它来知道这个链可以增长到多长。

youdao

Monkeys have long been used as a model for human brain studies, and so the results may also hold true for humans, though further research is needed to confirm that.

猴子早就被用来作为研究人类大脑的模型，所以这一研究结果可能同样适用于人类，尽管这还需要进一步的研究来证实。

youdao

Also,the root can stay in the ground for as long as three years, so it can be harvested as needed.

VOA: special.2010.06.08

"This is something that has been needed to be done for a long time, so here for us it's nice to see a close to the chapter, so to speak, and right an old wrong, " Anthony Griffiths, the great-grandson of Kelly's youngest sister Grace, told the Australian Broadcasting Corporation before the ceremony.

BBC: Memorial service held for Australian outlaw Ned Kelly

Ms Banerjee may be in power for some time, so she has the potential to develop the kind of long-term strategy that is needed for success.

ECONOMIST: Reviving Kolkata

So some are saying it's only natural that with the market climbing so high for so long that people want to take their profits, and many analysts say the market had needed a correction.

NPR: Taking Stock of China's Chaotic Market