OG13th SC第30题和第140题求解。万分感谢!
30.正确选项是D,即:Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated to be 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.
OG给出的解释是estimated 应该跟to be表示年纪的预估。
而140题,正确选项是E,即:Rock samples taken from the remains of an asteroid about twice the size of the 6Timile-wide asteroid that eradicated the dinosaurs have been dated at 3.47 billion years old and thus are evidence of the earliest known asteroid impact on Earth.
OG给的解释是:The idiomatic wayof expressing estimation of age is with the phrase “dated at”.
我不明白为什么后面跟年纪一会是at,一会又是to be,这个有具体的区别吗???
谢谢大家的帮助! |