LZM P225 E11-22

自尊宝

Like virtullay all of the nation's 50 busiest airports, new york's were built for an age of propellers, before jet planes weighing 800,000 pounds needed over two miles of runaway.

这句话啥意思？

不解之处有：
1。new york's were 为什么复数？
2。weighing ............修饰谁？
3。后面的句子 和 前面的 busiest 什么关系？

谢！

Louisa_xy

new york's机场可能有好几个，要用复数
weighing 修饰jet planes，重达.....的jet planes
没甚么关系。