It could be biofuel but there's a snag: a biofuel flame would be invisible.
它可以是生物燃料,但有一个障碍: 生物燃料的火焰是看不见的.
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The smog is due to invisible gases, mostly from automobile exhaust.
这种烟雾是由一些看不见的气体, 其中大部分是汽车废气造成的.
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It was foggy, a silhouette of the remote mountains could be barely seen.
他从头等舱皮椅左边的窗口斜着头朝外望去,外面雾蒙蒙的, 连远山的轮廓都几乎看不见.
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Seawater? Sightless , he listened, hunting the booming sounds of the ocean.
海水? 他看不见,只能听, 寻找着海浪的澎湃声.
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Only a short-sighted man will lose sight of the importance of education.
只有鼠目寸光的人才会看不见教育的重要性.
《现代汉英综合大词典》
For me, a performance is in front of a microphone, over the radio, to an unseen audience...
对我来说,表演就是在麦克风前通过无线电波面对看不见的听众进行的。
《柯林斯高阶英汉双解学习词典》
But to the eye of the ordinary, unimaginative traveler, they are invisible.
但在普通的, 无想象力的游客眼里, 它们是看不见的.
英语晨读30分(高三)
Today's idea also tacitly implies the recognition that you donot see now.
今天的观念也暗示了你默认自己目前还看不见.
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