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.

He is conducting research on superconductivity.

I can communicate with her telepathically.

I was asked to deliver a message from him to you.

Please leave a message on the message board.

I am majoring in electronics at university.

He is majoring in electrical engineering.

Due to a planned power outage tomorrow, electricity will not be available from 9 am to 3 pm.