A: This morning, the plenary session lasted for 4 hours from 9:30 a.m. to 1:30 p.m.
A: This morning, the plenary session lasted for 4 hours from 9:30 a.m. to 1:30 p.m.
答：今天上午9：30至下午1：30，第二轮六方会谈举行了4小时的全会。
A: This morning, the plenary session lasted for 4 hours from 9:30 a.m. to 1:30 p.m.
答：今天上午9：30至下午1：30，第二轮六方会谈举行了4小时的全会。