《资治通鉴·宋纪·宋纪七》
郁久闾吐贺真认为拓跋那士卒人数少却很顽强，怀疑援助拓跋那的主力大军将要来到，因此，撤去包围，连夜率军离开。
以那众少而坚，疑大军将至，解围夜去。
Yujiulü Tuhezhen thought Tuoba Na had fewer soldiers but they were very strong, and he suspect that the main force of the army supporting Tuoba Na was on the way to come, so he removed the siege and led the army to leave at night.
<s>[INST] I need this in both modern chinese phrasing and English - could you help? 以那众少而坚，疑大军将至，解围夜去。 [/INST] Contemporary: 郁久闾吐贺真认为拓跋那士卒人数少却很顽强，怀疑援助拓跋那的主力大军将要来到，因此，撤去包围，连夜率军离开。 English version: Yujiulü Tuhezhen thought Tuoba Na had fewer soldiers but they were very strong, and he suspect that the main force of the army supporting Tuoba Na was on the way to come, so he removed the siege and led the army to leave at night.</s>
I need this in both modern chinese phrasing and English - could you help? 以那众少而坚，疑大军将至，解围夜去。
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Contemporary: 郁久闾吐贺真认为拓跋那士卒人数少却很顽强，怀疑援助拓跋那的主力大军将要来到，因此，撤去包围，连夜率军离开。 English version: Yujiulü Tuhezhen thought Tuoba Na had fewer soldiers but they were very strong, and he suspect that the main force of the army supporting Tuoba Na was on the way to come, so he removed the siege and led the army to leave at night.
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