Sentence examples similar to are included only when necessary from inspiring English sources

At the protein level, mechanisms for controlling serine protease activity include producing kallikreins in an inactive 'proenzymes' (or zymogens) that are activated only when necessary.

They are applied only when necessary," Merkel said, referring to western sanctions on Russia.

Surgical biopsy is performed only when necessary.

Novak is counterpunching only when necessary now, only at extreme moments.

Transport chiefs have promised Games lanes will be used only when necessary.

Footnotes are to be used only when necessary.

Specific suggestions for improvement were included when necessary.

Therefore, the organism is specifically mentioned here only when necessary.

That includes using aggression only when necessary, and only to protect the lives of its family.

However, be careful to say it only when necessary.

Be strict with the students only when necessary.