This road is very narrow.

This factory strictly controls the emission of hydrogen sulphide.

The troposphere is the lowest part of the Earth's atmosphere, and most of the weather occurs here.

Carina is one of the constellations in the southern hemisphere.

The redback spider is a very dangerous spider native to Australia.

He suddenly stiffened and fell down.

He was greatly excited about the new project.

This season, the cherry blossoms are blooming beautifully.

The efficacy of this medicine is very high.

He was enclosed in his own thoughts.