insubstantial [ˌɪnsəbˈstænʃəl]

例句:

• Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide.
  火星的大气层极其稀薄，几乎全部由二氧化碳构成。
  来自柯林斯例句
• an insubstantial construction of wood and glue
  用木头和胶粘合的简单构造
  
• Her limbs were insubstantial, almost transparent.
  她的四肢非常纤细，几乎是透明的。
  
• The only outrage results from your insubstantial argument.
  来自SA
• Indeed, pretty but insubstantial tunes like Why You Wanna?
  来自BBC
• Sadly, Gardner's melody is too insubstantial to match his efforts.
  来自BBC