• 1. so long for now: 别离在此时
• 2. for so long - now: 很久了
• 3. Gone for so long now: 我离去了那么久

• 1.The carbon that we've put into the atmosphere keeps having a warming effect for 100 years, so we have to cut back rapidly now, because it will take a long time to work its way through into a response by the atmosphere.
  我们排放到大气中的碳会在100年内持续产生变暖效应，所以我们现在必须迅速减少排放，因为这需要很长一段时间才能在大气中产生效果。
  dict.yoduao.com
• 2.After building cities for so long, perhaps it's now time to start rebuilding nature.
  在建造城市这么久之后，也许现在是时候开始重建自然了。
  dict.yoduao.com
• 3.But Japanese people now live so long—life expectancy for women is 86; for men it is 80—that wooing them is lucrative.
  但现在的日本人寿命变长了，女性寿命预期为86岁，男性为80岁，于是老年人市场变得迷人了。
  dict.yoduao.com

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