It's a theoretical possibility.

　　這是理論上存在的可能性。

　　We cannot discount the possibility of further strikes.

　　我們不能低估再次發(fā)生罷工的可能性。

　　Selling the house is just one possibility that is open to us.

　　賣掉房子只是我們可以選擇的其中一種做法。