What do you say this sentence in Japanese?

This is my portion.

This joist is very important for supporting the structure of the house.

I was bitten by a mosquito and it's itchy.

Please cut this pizza in half.

The Tenbun era was a very important period in Japanese history.

A participle is a part of grammar where verbs and adjectives change into nouns or adjectives.

He disassembled the bicycle and repaired it.

He wakes up precisely at seven o'clock every morning.

In this industry, specialization is progressing.