He is an expert in ethology, and his research is highly regarded worldwide.

The train will arrive soon.

He likes to take a walk in the park at dusk.

My grandfather has been suffering from high blood pressure for many years.

He was diagnosed with acidemia.

I wonder where my sphygmomanometer is?

The vampire bat is active at night and sucks the blood of mammals.

A menstrual cup is one of the environmentally friendly and economical menstrual products.

I think what he says is utterly ridiculous.

Thanks to his thorough investigation, a new discovery was made.