The head was concerned that his men were too tired and hungry to fight.
头儿担心他的部下又累又饿已不能再战斗了。
If that is the case, may be they were concerned about fraud.
如果是这样的话，可能是他们关注欺诈行为。
When artists first saw our system they were quite concerned that machines would replace them.
当艺术家们第一次看到我们的系统时，他们最担心的是机器会取代他们。
When artists first saw our system they were quite concerned that machines would replace them.
当艺术家们第一次看到我们的系统时，他们最担心的是机器会取代他们。
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