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....
四与十的乘积是四十.The product of 4 and 10 is 40.可以看出,术语 “ 内乘积功 ” 有两种解释.It will be seen that the term " internal work product " is ambiguous.点积是三个标量的乘积, 所以是个标量.The dot product, being the product of three scalars, is a scalar....
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...