However, Martin Feldstein notes that the system could be very complex.

然而，马丁·菲尔德斯坦指出，这个系统可能非常复杂。

youdao

However, Martin Feldstein notes that the system could be very complex.

然而，马丁·菲尔德斯坦指出，这个系统可能非常复杂。

youdao