This typeofbarrier is a combination of the pumping trough and the hydraulic ridge.
这类屏障是把抽水槽和水力分水岭结合在一起。
2
The only good news was that according to the researchers’ calculations this typeofbarrier-busting quake should occur in this zone on average only once every 4,000 years.
经过测算，研究者所能提供的唯一的好消息是该地如此强力的地震平均每4000年发生一次。
3
No one now knows how easy it would be to turbo-charge an existing human pathogen, or take one that infects another typeof animal and assist its passage over the species barrier.