Using punctuation marks correctly is important for understanding sentences.

What is this solid made of?

There are sediments at the bottom of this lake that have accumulated over centuries.

His art style is unique, it's neither fish nor fowl.

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.

I will participate in an obstacle race this weekend.

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