Trump竞选时就抱怨过，不知是否在他任内有所改观。

In a freewheeling speech Thursday afternoon, Republican frontrunner Donald Trump stumbled into a riff about how great trains are. It’s sad, he said, that the American rail system is so dilapidated while China’s is now slicker than ever.

“They have trains that go 300 miles per hour,” the populist billionaire exclaimed. “We have trains that go chug … chug … chug.”