Anger is the natural reaction we experience when we feel threatened or frustrated.

愤怒是我们受到威胁或遇到挫折时的自然反应。

《柯林斯英汉双解大词典》

Your immediate reaction will be to try even harder, but that will only make you increasingly frustrated.

你的应急反应需要更加辛苦，但是这只会加大你的失落感。

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Murray was hitting the ball cleanly and confidently, and when Federer wasted a chance to get the break back in game three with a poor forehand drop shot, the unusually frustrated reaction from the Swiss said it all.

BBC: Andy Murray beats Roger Federer to win Shanghai Masters

Dr Henderson was frustrated by that reaction.

ECONOMIST: The debate over global warming is getting rancorous

Mr Who said he was frustrated at the limited information given to passengers, and the reaction of customer services staff when he called them from the static train.

BBC: Brighton to London commuters stranded for four hours