形容詞 unable:

1. (usually followed by `to') not having the necessary means or skill or know-how
2. (usually followed by `to') lacking necessary physical or mental ability
3. lacking in power or forcefulness
   同義詞：ineffective, ineffectual

1. The Finance Director sends her apology and is unable to attend the meeting.
   財務(wù)董事派人帶話說，她因不能出席會議而向大家道歉。
2. The interruption of electricity made us unable to do anything.
   電力的中斷讓我們什么也不能做。
3. I'm stuck on (ie unable to answer) the second question.
   我在第二個問題上卡住了(不會回答).
4. A little baby is unable to walk or talk.
   嬰兒既不會走也不會說。
5. We are as yet unable to say when the train will arrive.
   我們還說不上火車什么時候到達(dá)。
6. I am unable to cycle to school because my bicycle is broken.
   我不能騎車上學(xué)，因為我的自行車壞了。