Antibiotic resistance has now become a costly and dangerous problem.
抗生素抗药性不仅代价高昂，也非常危险。
Now environmental pollution has become a very serious problem the world is facing today.
现在环境污染已经成为当今世界面临的一个非常严重的问题。
The problem of the stock market is a lot, but I still love this market, as their own children, even if it has not, we still believe that the future will be more better than now.
股市的问题的确很多，但我仍太爱这个市场了，就像自己的孩子一样，即便它百般不是，我们仍相信它未来会更比现在好。
Now the Prius has a huge problem.
现在，普锐斯面临巨大的问题。
Now, energy issue has become a global problem.
能源问题已经成为了全球问题。
Vidic has had a calf problem for a few weeks now.
维迪奇有伤已经好几周了。
Periodontal tissue regeneration has been a common and complicated clinical problem now.
牙周组织再生已经成为一个共同且复杂的临床难题。
Periodontal tissue regeneration has been a common and complicated clinical problem now.
牙周组织再生已经成为一个共同且复杂的临床难题。
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