He's well able to take care of himself.
他完全能夠自理。
I've never been able to work her out.
我從未能摸準她的秉性。
You need to be able to work as part of a team.
你必須能作為團隊的一員去工作。
They were able to come and go at will.
他們能夠來去自由。
They were able to achieve a settlement without using military force.
他們沒有訴諸武力就解決了問題。