He called from Washington, having been there for 31 hours straight.
他从华盛顿打来了电话，他已在那里连续呆了31个小时了。
He removed all traces of having been there.
他抹去了他曾到过那里的所有痕迹。
Having been there many times, he offered to be our guide.
他因多次去过那里，主动提出做我们的向导。
Having been there several times, he offered to be our guide.
他由于去过那多次，可以当我们的导游了。
Having been there several times, he offered to be our guide.
他由于去过那多次，可以当我们的导游了。
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