1.at one's disposal 由某人支配，供...使用
音标 [æt wʌnz dɪˈspəʊzl]
Loan refers to the business of lending money to others for use, including loans lent with funds at one's own disposal and enlending.
Occupational risks exist at disposal facilities that are not well designed, run, or maintained.
2.(be) engaged in 从事 ，参与
音标 [ɪnˈɡeɪdʒd ɪn]
They have engaged in trade for many years.
He is engaged in scientific research.
3.at one time 曾经，一度；同时
音标 [æt wʌn taɪm]
At one time 400 men, women and children lived in the village.
At one time, walking across the room took all her strength.
4.end up with sth/doing sth. 用...结束...
音标 [end ʌp wɪð]
I had to keep my end up with other professors in the faculty.
If they take this game lightly they could end up with egg on their faces.
5.come into fashion 开始风行；流行
音标 [kʌm ˈɪntə ˈfæʃn]
As new words come into fashion, some old ones are casualties.
The church wedding ceremony as performed in the West has now come into fashion in China, too.