N
a cell having a mercury cathode surrounded by a paste of mercuric sulphate and a zinc anode in a saturated solution of zinc sulphate. Formerly used as a standard, its emf is 1.4345 volts 克拉克电池
[physics]
Duncan Clark of Beijing telecoms consultancy BDA says putting Chinese cell phones in the hands of the people of New York or Los Angeles or London is a few years away yet.
The centre is already under construction and the president of Stanford University, John Hennessey, supported Mr Clark, saying that many scientists were concerned about the long-term impact of restrictions on human embryonic stem cell research.