几个讨论很久的问题，还是请法语区版主盖棺定论吧 - ChaseDream

15: Reptiles, by drawing their body heat directly from the Sun rather than burning calories to generate it, can survive on ten percent of the nourishment that a mammal of similar size would normally require>>

9: As a pianist, composer, scholar, and essayist on a variety of learned subjects, among the most gifted and versatile musicians of his time was Camille Saint-Saens (1835-1921) who was, as many of his contemporaries were, deeply interested in Oriental themes.

A: As a pianist, composer, scholar, and essayist on a variety of learned subjects, among the most gifted and versatile musicians of his time was Camille Saint-Saens (1835-1921), who was

B: As a pianist, composer, scholar, and essayist on a variety of earned subjects, Camille Saint-Saens (1835-1921) was among the most gifted and versatile musicians of his time, and having been

C: Pianist, composer, scholar, and essayist on a variety of learned subjects, among the most gifted and versatile musicians of his time was Camille Saint-Saens (1835-1921), and he was

D: Pianist, composer, scholar, and essayist on a variety of learned subjects, Camille Saint-Saens (1835-1921) was among the most gifted and versatile musicians of his time, and was

E: Pianist, composer, scholar, and essayist on a variety of learned subjects, Camille Saint-Saens (1835-1921), who was, among the musicians of his time, one of the most gifted and versatile, had been

30: The United States petroleum industry’s cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.

A: The United States petroleum industry’s cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.

B: It is estimated that by the end of the decade the cost to the United States petroleum industry of meeting environmental regulations will be ten percent of the price per barrel of refined petroleum.

C: By the end of the decade, the United States petroleum industry’s cost of meeting environmental regulations is projected at ten percent of the price per barrel of refined petroleum.

D: To meet environmental regulations, the cost to the United States petroleum industry is estimated at ten percent of the price per barrel of refined petroleum by the end of the decade.

E: The United States petroleum industry’s cost by the end of the decade to meet environmental regulations is estimated at ten percent of the price per barrel of refined petroleum.