所以，是的吗？

我知道了 。 。

Push the Envelope =增加能力；扩大界限

"Michael really played well today. I have never seen him play like that!
--"Yah, he really pushed the envelope."

"With the proliferation of computers, Microsft began to push the envelope in the world of technology."

Philomniglot：请问理解了吗？

帮顶。