A gasoline burner hung from the center of the ceiling of each classroom, the students put the desks in two big circles, Shiquan and Yimin sat beside each other.
特别是夜自修，每班课堂中央挂一盏汽油灯，学生把课桌围成两大圈，石泉和伊敏并排坐在一起。
2
It requires that a test specimen be installed in a horizontal (ceiling) position and then be exposed to a gas burner flame.
这种方法要求被测试样安置在地面或者天花板上，然后面向燃气火焰。
3
It requires that a test specimen be installed in a horizontal (ceiling) position and then be exposed to a gas burner flame.