Sufficient caution is necessary when handling radioactive materials.

His language contains many ejective sounds.

This area is off-limits due to radioactive contamination.

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

Radioactive elements are produced in nature and scientific experiments.

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.

Changes in the social system inevitably occur with time.

Social justice means that all people are treated equally.