b1-b2 adj

sufficient

We have sufficient food for everyone.

достаточный

accurate

The report is accurate and clear.

точный, правильный

convincing

Her argument was very convincing.

убедительный

reliable

This car is old but reliable.

надежный

considerable

He spent a considerable amount of money.

значительный

widespread

The disease is widespread in that region.

широко распространенный

essential

Water is essential for life.

необходимый, крайне важный

beneficial

Exercise is beneficial to your health.

полезный, благоприятный

harmful

Smoking is harmful to your lungs.

вредный

efficient

This machine is fast and efficient.

эффективный