另外泡沫可能来自环保或替代能源股。
Another bubble possibility is green, or alternative energy, shares.
与此同时，固体催化剂可替代液体酸，这样更绿色和环保。
At the same time, solid catalysts may replace liquid acids for a green process.
氢能是高效、环保型替代能源。
Hydrogen is an alternative energy source with high efficiency and pollution free.
氢能是高效、环保型替代能源。
Hydrogen is an alternative energy source with high efficiency and pollution free.
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