uncertain [ʌnˈsɜ:rtn]

例句:

• Students all over the country are facing an uncertain future.
  全国各地学生前途未卜。
  
• The sandbank was uncertain, like quicksand under his feet.
  那个沙坝并不稳固，他脚下如同踩着流沙一般。
  
• For a minute he looked uncertain, and then recovered his composure.
  有一小会儿他看上去有些迟疑不定，之后又恢复了镇定。
  
• Things may be uncertain, but you never know?
  来自BBC
• Now, the fate of the project remains uncertain.
  来自VOA
• He was unhappy, muddled, uncertain about...his sexuality.
  来自P. D. James