为什么用since?my bother studied at the high school since he joined the army
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为什么用since?
my bother studied at the high school since he joined the army
我的哥哥高中毕业后就去参军了
自从,自什么之后
为什么用since?
my bother studied at the high school since he joined the army
我的哥哥高中毕业后就去参军了
自从,自什么之后