This friend is a physicist, who has spent a long career deciphering what must be happening in the interior of stars.
这个朋友是一位物理学家，长期致力于破解恒星内部的奥秘。 
This friend is a physicist, who has spent a long career deciphering what must be happening in the interior of stars.
这个朋友是一位物理学家，长期致力于破解恒星内部的奥秘。 
