at one time什么意思

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]...

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....