何时: when...
典型: model, typical case, archetype, typical, representative...
环绕: to surround, to circle, to revolve around...
围墙: perimeter wall, fence...
怀疑: to doubt (sth), to be skeptical of, to have one's doubts, to harbor suspicions, to suspect that...
合计: to add up the total, to figure what sth amounts to, to consider...
裤子: trousers, pants...
下一代: the next generation...
上方: place above (it), upper part (of it)...
搞: to do, to make, to go in for, to set up, to get hold of, to take care of...
