1.By the 1990s, energy-dense nickel-metal hydride batteries were on the market, soon followed by lithium-ion batteries.

到了 20 世纪 90 年代，市场上出现了高能量密氢电池，很快，锂离子电池也问世了。

2.Lithium ion batteries are much smarter than older nickel cadmium or nickel metal hydride rechargeable batteries.

锂离子电池比旧镉或金属氢物可充电电池智能得多。

3.A lot of those battery life myths you might hear apply to nickel-cadmium and nickel-metal hydride batteries.

你听到很多关延长电池寿命小窍门，仅镉和氢电池。

4.Hybrids aren't true electric vehicles; their nickel-metal hydride batteries are only used to optimize the efficiency of gas-burning engines.

混合动力车并不是真正电动汽车；他们氢电池仅优燃汽油发动机效率。

5.Take sodium hydride, for example — a superbase that’s just sodium bonded to a hydrogen.

以氢钠为例——钠与氢键合超级碱。机翻

6.The sodium hydride could be combined with water to produce sodium hydroxide and hydrogen gas.

氢钠可以与水结合产生氢氧钠和氢气。机翻

7.Since superbases quickly react with water, sodium hydride can be used as a drying agent, to dry chemicals in the lab.

由超级碱与水迅速反应，氢钠可作干燥剂， 干燥实验室中学品。机翻