extant problem的用法和樣例：
例句
- The problem is that the most practical option for such a corridor would be in former Peruvian territory.
現在問題是，這個最切合實際的運輸通道將會經過秘魯的一個原屬地區。 - Media reports on Friday suggested that Kolo Toure and William Gallas had fallen out for a period this season but the problem was now sorted out.
周五媒體報道猜疑圖雷和加拉在本賽季一段期間鬧翻，但是現在問題得到了解決。
