A: Scientists have identified five unique hepatitis viruses, identified by the letters a, b, c, d, and E. While all cause liver disease, they vary in important ways.

答：科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。

youdao

Scientists have identified five unique hepatitis viruses, identified by the letters A, B, C, D, and E. While all cause liver disease, they vary in important ways.

科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。 虽然它们都会引起肝病，但在重要方面又有所不同。

youdao

C, unique localization structure and precision high mere distance system, guarantee the exactness and repetitiveness of the measurement value effectively.

独特的定位结构及高精度的光路系统，有效保证测量值的正确性及重复性。

youdao

C, Leptis Magna is a unique artistic realization in the domain of urban planning.

UNESCO: World Water Assessment Programme (WWAP)

C. take it upon themselves to go further in existing buildings in unique and creative ways.

WHITEHOUSE: Energy and Environment Latest News | The White House

C. has been a leader in the field of white collar defense on a scale that is unique in the U.S. legal market.

FORBES: The Insider - White Collar Defense and Securities Enforcement - Archive