光在水、玻璃，甚至是空气中的传播速度比起在真空中慢得多。
Light travels slower through water, glass, even air, than through a vacuum.
所有证据都证明，此种疾病是由水传播的理论是不能成立的。
All the evidence argued against the theory that the disease was transmitted by water.
他们更多的声音在下的水传播。
他们更多的声音在下的水传播。
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