This contract will be void if it becomes impossible to perform due to force majeure.

Proportional representation is an important system to ensure the fairness of elections.

The thyroarytenoid muscle plays a crucial role in regulating the tension of the vocal cords.

Essential fatty acids are vital nutrients for our health.

Essential amino acids cannot be produced by the human body, so they need to be obtained from the diet.

Essential fatty acids are important nutrients for our health.

Essential amino acids, which the human body cannot produce on its own, need to be obtained from the diet.

Essential amino acids are necessary to be taken from our diet because our body cannot produce them on its own.

He had a throat problem, and it was found that his posterior cricoarytenoid muscle was not functioning properly.

The lateral cricoarytenoid muscle plays a crucial role in regulating the tension of the vocal cords.