At one time the schools were mainly attached to the church.这些学校曾一度归教会主管。All of them were French possessions at one time or another.它们都曾是法国的领地。At one time they used to mine coal in these valleys.从前他们在这些峡谷中采煤....

一度， 从前...

at one time的音标：at one time的英式发音音标为：[æt wʌn taim]at one time的美式发音音标为：[æt wʌn taɪm]...