3. “Climate change is perhaps the major challenge of our generation,” said Michael H. Freilich, director of earth sciences at NASA, one of the agencies that track global temperatures.
5. 单词intended 联想记忆：
6. Last year was the hottest on earth since record-keeping began in 1880, scientists reported on Friday, underscoring warnings about the risks of runaway greenhouse gas emissions and undermining claims by climate change contrarians that global warming had somehow stopped.
西西软件园 "You can no longer have some countries go first and others come in later, because there is no more time," said Glen P. Peters, a scientist at the Center for International Climate and Environmental Research in Oslo, who helped compile the new numbers. "It needs to be all hands on deck now."