Peroxides play an important role in chemical reactions.

In this situation, the proverb 'it is best to submit to circumstances' applies.

I will participate in an obstacle race this weekend.

He spoke of his big dreams, saying, 'How can a sparrow understand the ambitions of a swan?'

He is exactly in the state of 'A frog in a well does not know the vast ocean.'

Basic oxides react with acids to produce salt and water.

This area is affected by radioactive fallout from past nuclear tests.