Plastic pollution has been one of the most serious problems today.

塑料污染是当今最严重的问题之一。

youdao

Nutrient problem is one of the most serious problems.

营养问题是最严重的问题之一。

youdao

The most serious problems are seen in the tiniest babies.

月份最小的胎儿问题也最严重。

youdao

Clark sees traffic congestion as one of the most serious problems of our time - for a variety of reasons.

VOA: standard.2010.07.26

But these are things that can be minimized and lessened if Mexico and the United States work together, identify the most serious problems and try to fight them in very focused ways."

VOA: standard.2009.12.18

Although hot weather just makes most people feel hot, it can cause serious medical problems, even death.

VOA: special.2010.07.27

Corruption and nepotism at the top are cited among the most serious problems in Senegal.

BBC: Senegalese President Abdoulaye Wade's rise and rule

Each year, the IRS Taxpayer Advocate issues a report identifying the most serious problems encountered by taxpayers.

FORBES: The Case For Investing in the IRS

But Ford caused some of his most serious problems himself, notably in the last days of the campaign.

NPR: Ford Remembered in His Own Words