The vice-chairman helped with the preparation of the meeting.

He goes to the gym every day to train his longissimus muscle.

This rock contains a lot of neutral feldspar, especially andesine.

The black grouse is known for its beautiful feather color.

There were many waterfowls in the pond at the park.

Guano is very valuable as a fertilizer.

I heard the beautiful voice of a songbird in the park.

He missed school due to poor physical health.

We need to conduct a factual investigation on this issue.

The longissimus capitis muscle is a part of the neck muscles, helping to pull the head back.