lag

In this scenario, due to the lag time required to assimilate new resources, the relationship between required resources and estimated delivery timeframe may even turn negative.

在这种情况下，由于时间已经落后，需要吸收新的人力资源，需要的资源和预计的交付时间的关系甚至更加复杂。

But to many, at least as far as science is concerned, it is the countries that were doing well that are now doing better, whereas those at the bottom continue to lag significantly behind.

但是对于许多人而言，至少在科学方面，正是那些在过去做的很好的国家现在正在做的更好，而那些位于底层的国家的科学继续落后。

One is that some countries still lag behind.

一个原因是一些国家仍很落后。