smokelessly

常見例句

• An effective system uses fuel that ignites easily, burns as smokelessly as possible.
  有傚的加熱系統(tǒng)所用的燃料必須易於引火，燃燒時盡可能無菸。
• 33. An effective system uses fuel that ignites easily, burns as smokelessly as possible.
  有傚的加熱系統(tǒng)所用的燃料必須易於引火，燃燒時盡可能無菸。
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