旧车置换补贴只是暂时刺激了汽车产量，但对经济没有持续影响；

Cash-for-clunkers gave a temporary boost to motor-vehicle production but had no lasting impact on the economy.

youdao

但是，刺激是暂时的。

But stimulus is temporary.

youdao

就这个理论而言，即使财政刺激计划暂时减少了失业率，在长期来看也会完全失效。

Even if a stimulus package temporarily reduced unemployment, in this theory, it would be entirely ineffective over the long haul.

youdao