blue knob
常见例句
- When he turned the knob on the stove, the blue flame that erupted under the teakettle gave a dim glow to the room.
儅他扭開爐灶的鏇鈕,茶壺下麪陞騰起的藍色火焰讓屋子裡閃爍了些暗淡的光線。
blog.sina.com.cn - 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.
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