3.on the up<英,非正式>欣欣向荣;日益兴旺
They're saying that the economy is on the up.他们说经济正蒸蒸日上。
4.on the up and up<英,非正式>(on an upward trend)欣欣向荣;日益兴旺
People had money, opportunities, hope – things were on the up and up.当时人们有钱, 有机会, 有盼头——生活欣欣向荣。
<美,非正式>(sincere)安分守己;诚实可靠
I'm a pretty good judge of men. If you're honest and on the up and up, I'll be able to tell it.我看人相当准。如果你是个诚实可靠的人, 我是能看出来的。