唯有 (wéi yǒu): only

This interview opportunity is rare; only by giving it your all can you avoid regret.

Faced with a sudden flood, only by uniting can we overcome the crisis.

Only those who have personally experienced failure can truly understand the joy of success.

In the late-night library, only the sound of a pen scratching paper kept her company.

Only by constantly learning new knowledge can one adapt to this rapidly changing society.