If it continues like this, he expects levels of pollution to double over the next 15 years.

如果继续这样下去，他预期污染水平将在接下来的15年内翻番。

youdao

If Treasury yields return to June levels, the ETF could double in price.

如果国债收益率回到6月的水平，ETF的价格可能上升一倍。

youdao

Remittances have fallen by double digits, in some countries to half their 2008 levels.

与2008年相比，今年汇款额降幅已达两位数，一些国家甚至减半。

youdao

All months showed double-digit levels of growth for the period.

FORBES: Asian Consumers Tell Time with Swiss Watches

The total number of tourists heading for Mediterranean coastlines is expected to rise to between 235 to 355 million per year by 2025 - roughly double 1990 levels.

BBC: NEWS | Science/Nature | Tourism damaging Med's wetlands

The bubble formed like this: When countries such as Ireland, Greece and Spain joined the euro, their interest rates immediately dropped to near-German levels, in some cases from double-digit territory.

WSJ: The Weekend Interview with Bernard Connolly: Why the Euro Crisis Isn't Over