And Andrew had been doing his own bits of research, and one of the things that he had been told and that he'd learned from studying the literature was that there's actually a big bottleneck.
Андрю провеждаше свое научно изследване. Едно от нещата, които му бяха казали, и които беше научил  от специализираната литература, беше че всъщност има голяма пречка.