Toilets will use flowing air instead of water to move waste through the system.
通过特定系统，流动的空气将取代流水冲走坐便器内的排泄物。
They need something to move through, like air, water, or rock.
声波传递需要介质，空气，水，岩石都行。
The boats move through the water quickly, and the crowds watch and cheer.
龙舟在水面上航行的速度飞快，观众一面观赛一面欢呼加油。
The boats move through the water quickly, and the crowds watch and cheer.
龙舟在水面上航行的速度飞快，观众一面观赛一面欢呼加油。
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