The study dismisses another blimpish idea, though: that of pumping sulphurous chemicals up a long pipe held aloft by a large tethered balloon.
报告排除了另一种早期的设想，即通过一个巨大的系留气球，用固定在上面的长长的管子向天空喷洒硫化物。
The study dismisses another blimpish idea, though: that of pumping sulphurous chemicals up a long pipe held aloft by a large tethered balloon.
报告排除了另一种早期的设想，即通过一个巨大的系留气球，用固定在上面的长长的管子向天空喷洒硫化物。
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