5.bugs:微生物。非正式口语表达,所以使用了引号。
6.Kelvin:可翻译成绝对温度。Kelvin Scale ,绝对温标,开氏温标,是由Kelvin 勋爵于19世纪中叶发明的温度计量方法,其零度相当于摄氏一273. 15 C ,被认为是宇宙中最低温度。这种温度计量方法多为科学家使用。
7.principal investigator:研究项目负责人
8.rule out:排除的可能性
练习:
1 .What have scientists found about Saturn?
A They have found a new moon orbiting Saturn.
B They have found methane-based life on Saturn.
C They have found methane-based life on Titan.
D They have found earthlike life on a Saturns moon.
2. What do scientists say about Titan?
A There are life clues there.
B There is acetylene there.
C Water on Titan exists in the form of ice.
D Rivers and lakes there contain life formls.
3. To date,scientists have not yet detected this form of life.(paragraph 5)What doesthis form
of life refer to?
A Water-based life.
B Methane-based life.
C Liquid-water-based microorganisms.
D Gas-based life.
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