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 collapsed from cardiac arrest.

I saw a masked palm civet in the park.

He stole the wallet on a sudden evil thought.

Every morning, I chant the Heart Sutra.

Her piety left a deep impression on all of us.

He has a deep loyalty to his country.

You need to be mentally prepared before the exam.

His heart was a symbol of his love.