He always buys cheap things, so in the end, it becomes 'penny wise and pound foolish'.

Acidic oxides react with water to produce acids.

Aluminum is an amphoteric oxide, it reacts with both acids and bases.

Peroxides play an important role in chemical reactions.

In this chemistry experiment, we will learn about the dangers of cyanide compounds.

I will participate in an obstacle race this weekend.

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

He chose a stable job, saying 'a bird in the hand is worth two in the bush.'

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

Basic oxides react with acids to produce salt and water.