1. one and a half hours
2. one hour and a hour 注意表达方式2 hour后边不加s（因为是一小时）
3. ninety minutes
an hour and a half
ninety minutes
one and a half hours
an hour and a half
a half to two hours
one and a half hours
an hour and a half
a half to two hours
one and a half hours
one and a half hours
one hour and a half
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