This rock is radioactive, so care must be taken when handling it.

Radioactive elements are produced in nature and scientific experiments.

He started attending at the hospital.

The radiation dose in this area exceeds the safety standards.

Let's use a radiation dosimeter to measure the radiation levels in this area.

Every Saturday, I do volunteer work at the local library.

His language contains many ejective sounds.

He is a very excellent tailor.

This area is off-limits due to radioactive contamination.

Sufficient caution is necessary when handling radioactive materials.