但罗森塔尔说，这种方法产生的震动频率范围很窄。
But this approach only allows vibrations within a narrow band of frequencies to be generated, says Mr Rosenthal.
我的伴侣彼得奥洛夫斯基，管家人罗森塔尔以及赫尔，比尔莫金
companion Peter Orlovsky, caretakers Rosenthal &Hale, Bill Morgan
罗森塔尔表示：“你的背后不应该有亮光，因为这会让你的脸色变暗。”
"There shouldn't be light behind you, because it will darken your face," Rosenthal says.
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