21.Stunning Pictures Show an Alien Moon Eerily Like Earth

时态

十个单词

sink[sɪŋk]沉没
Presumably大概[prɪ'zjuːməblɪ]
frigid寒冷的 ['frɪdʒɪd]
plain平原[pleɪn]
whereas然而
substantial大量的[səb'stænʃ(ə)l]
ambassador大使[æm'bæsədə]
mission 使命['mɪʃ(ə)n]
plunge 跳入[plʌn(d)ʒ]
appeal申请[ə'piːl]
exotic异国情调的[ɪg'zɒtɪk]
smog[smɒg]
beam光线，发送[biːm]
horizon[hə'raɪz(ə)n]

语法

• could have been 对过去发生的，可能的推断
  must have been 对过去发生的，肯定的推断
  can be目前的，可能的推断
  must be目前的，肯定的推断
• 方位：over under正上方，正下方
  above below高于、低于
  on beneath在某物上，挨着。在某物下，挨着。

专业词汇

spacecraft宇宙飞船
Huygens probe惠更斯 探测器[prəʊb]
Titan土卫六[taɪtn]泰坦
atmosphere 大气['ætməsfɪə]
Ultra-low temperatures极端的['ʌltrə]
organic有机物[ɔː'gænɪk]
nitrogen ['naɪtrədʒ(ə)n]氮气

句子

• The girl hid her box without anyone knowing where it was.
• People in my hometown tend to be very friendly you seem to get to konw more friendly people.
• “It’s the only other substantial nitrogen atmosphere besides ours,” Hörst says. “Presumably, a lot of the chemistry in Titan’s atmosphere could have been happening on the early Earth, before oxygen.”