He overcharged me with an excessive price.

This area is affected by multiple contamination.

Learning how to use compound verbs is important for understanding Japanese grammar.

Compound nouns are a very important part of Japanese grammar.

This problem is very complex, and it is difficult to solve.

There are multiple errors in this document.

This market is in a state of duopoly by two large companies.

It was revealed that he was polygamous, which became a big problem.

As a result of the double trial, he was judged innocent.

Recently, I've been experiencing symptoms of diplopia, and I'm worried.