blue knob

常见例句

双语例句

• When he turned the knob on the stove, the blue flame that erupted under the teakettle gave a dim glow to the room.
  当他扭开炉灶的旋钮，茶壶下面升腾起的蓝色火焰让屋子里闪烁了些暗淡的光线。
  blog.sina.com.cn

权威例句

• Not quite as long as Saxe has in developing something called SmartGlass, which changes from dark blue to almost clear with the turn of a knob.
  FORBES: Magazine Article
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