【正确答案】The world's population could (1)swell to 10.9 bil-lion by the end of the century, (2)a new United Nations analysis found, (3)raising concerns that adding more than 3 billion people to the planet could further (4)de-plete natural resources and accelerate global warming.The global (5)fertility rate will continue'to decline though, experts say the world's overall population will still rise, (6)hitting 9.7 billion by 2050.The new report predicts slower population growth than the UN's last as-sessment, (7)released in 2017.That estimate projected that the world population would reach a (8)staggering 11.2 billion by the end of the century.The revised figures reflect the (9)downward trend in the global fertility rate, wluch means the populations of more countries are shrinking.

【答案解析】(1)swell意为“增加，扩大”，swell to表示增长的幅度较大，意为“增至……”。
(2)“联合国最新分析发现”作状语，可使用ac-cording to引导，放在句子开头，也可以放在句尾，译为a new United Nations analysis found。
(3)“人们担心……”是由前一句引发的担忧，在翻译时可译为结果状语从句，与前一句的连接更紧密。raise concems意为“引起关注，引发担忧”。
(4)“耗尽”可译为deplete。
(5)“生育率”为固定搭配，译为fertility rate。
(6)“达到”可用hit表示，意为“达到（某水平）”。
(7)“2017年发布的”作“上一次评估”的定语，在翻译成英文时可作后置定语。
(8)“惊人的1 12亿”中“惊人的”可译为staggering。
(9)“下降的趋势”可译为downward trend。