| 单词 | hydrogen |
| 释义 | hydrogen /huy"dreuh jeuhn/, n. a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. Symbol: H; at. wt.: 1.00797; at. no.: 1; density: 0.0899 g/l at 0°C and 760 mm pressure. [1785-95; < F hydrogène. See HYDRO-1, -GEN] |
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