Question

he made a hole and pointed it up the hill.so that

he made a hole and pointed it up the hill.so that the wind couldn't blow into the hole请教怎么翻译，up在此句中什么意思

Answer 1

through which中which指代的是hole，因此通过这个洞，通过必须用through这个介词，其它介词in on at都不对。through which he could see what was happening inside 是一个非限制性定语从句修饰先行词a hole