宾州煤的蕴藏量为三百五十亿吨.Pennsylvania sits on 35 billion tons of coal.一茶匙中子星上的物质重达十亿吨.One teaspoonful of material from a neutron star would weigh a billion tonnes....
The real ways nature copes with the cold are almost as amazing as these old tales.大自然应对寒冷的真实方法几乎和这些传说同样令人惊奇.I don't know how she copes with looking after her family and doing a full-time job.既要照顾家庭又要工作, 我不知道她是怎样应下来的...