The principles of fuel cell operation were first reported by British scientist Sir William Grove in 1839.
燃料电池的工作原理是英国科学家威廉·格罗夫爵士于1839年首先报告的。
In fact, when this feature is enabled, and the INSERT operation requires a new or reused block, DB2 will take an exclusive (x) lock on the block in order to add it to the target cell.
实际上,当该特性被启用,并且INSERT操作要求一个新的或重用的块时,DB 2将在块上采用一个独占的(X)锁,以便将它添加到目标单元。
Finally, a fully enclosed battery pack provides between 16.5 and 22 watt-hours of operation (depending upon cell technology).
最后,全封闭的电池组可提供16.5到22瓦小时的连续操作(取决于电池技术)。
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