A Tegmark fears he may hold the record for the longest time taken to read one book.
B In a more positive vein, this is a wonderful collection of essays to dip in and out of if you already have a good overview (概述) of current cosmic understanding.
C Levy is an active astronomer and an accomplished writer, so you'd expect him to provide a broad and accurate picture of our current understanding of the cosmos.
D Scientific American has attempted to cater to this need by bringing together essays that have appeared in the magazine.
E To some extent, these could have been plugged with a glossary (词表) of terms.
F Also included are contributions on the world of subatomic particles, the origin of life on Earth and the possibility of its existence elsewhere
[ 结 束 ]
