No one knows his inner thoughts.

A journey to the Earth's core is a big challenge for scientists.

Could you please tell me how to calculate the excenter of this triangle?

He harbors regret for that decision.

He is a person with strong self-control.

His behavior aroused suspicion.

Every morning, I chant the Heart Sutra.

Her piety left a deep impression on all of us.

He has a strong sense of public spirit and is always working for the community.

He collapsed from cardiac arrest.