If all the people alive on the earth today were hand in hand like this,the line they would make would go much more than fifty times round the earth.请问这里的 the line 和 they would make would go 这里为什么这么用？

If all the people alive on the earth today were hand in hand like this,the line they would make would go much more than fifty times round the earth.请问这里的 the line 和 they would make would go 这里为什么这么用？
If all the people alive on the earth today were hand in hand like this,the line they would make would go much more than fifty times round the earth.
请问这里的 the line 和 they
would make would go 这里为什么这么用？

If all the people alive on the earth today were hand in hand like this,the line they would make would go much more than fifty times round the earth.请问这里的 the line 和 they would make would go 这里为什么这么用？
这句的意思是：
要是现在地球上所有的活着的人们像这样手拉手,那么这个（手拉手的）长度就会绕地球50多圈
the line 就是指人们手拉手所排的队伍的距离
they 这个代词,指代people