将“fourfold"翻译成中文

Having made this progress, there is now a fourfold challenge before us, in my view.

我认为,虽然我们取得了这一进展,但我们目前面临四重挑战。

In the Kivus alone, this number has increased more than fourfold over the last 12 months.

仅在南北基武两省,过去一年里,这一数字就增加了四倍以上。