在我们言归正传之前，让我们先来探讨一下经济复苏为何如此缓慢？

Before we get to that, let's talk about why economic recovery has been so long in coming.

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科学家们认为蛤蜊长寿的秘诀在于其细胞代谢过程的缓慢，但是仍然不知道它为何如此缓慢。

Scientists believe the secret to the clams' longevity is a slowed cell-replacement process. But why they age so slowly is unknown.

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科学家们认为蛤蜊长寿的秘诀在于其细胞代谢过程的缓慢，但是仍然不知道它为何如此缓慢。

Scientists believe the secret to the clams' longevity is a slowed cell-replacement process. But why they age so slowly is unknown.

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