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.
网络文摘精选
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.
网络文摘精选
Second has resentment, use a peaceful silken robe to armour, after borrowing, also avoid meeting.
乙怀恨在心, 便向甲借用一件宁绸袍子, 借去后也避而不见.
网络文摘精选
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.
网络文摘精选
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.
网络文摘精选
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）
