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They met with numerous difficulties in doing the experiment.

他们在做这项实验时碰到了许多困难。

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The young scientist encountered numerous difficulties during his exploration.

这个年轻的科学家在探索的过程中遭遇了很多困难。

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He was an easy-going man whose abundant good humour helped to get the Olympic committee through numerous difficulties.

ECONOMIST: Lord Killanin

This piece addresses both the importance of having access to health care needs, and the numerous and painful difficulties of a mother dealing with a violent child.

FORBES: Mental Health Needs to be a National Discussion