英語二復習精要UNIT 2(2)

　　2、?？季湫?BR>　　1、天文學家和科學家認為黑洞是一種空間區(qū)，物質(zhì)可以掉進黑洞但任何物質(zhì)不能逃脫。P1
　　Astronomers and scientists think that a black hole is a region of space into which matter has fallen and from which nothing can escape.

　　2、理論上是這樣的：當某些星體的密度增大到某一特定點時便發(fā)生爆炸。P2
　　The theory is that some stars explode when their density increases to a particular point.

　　3、有人認為圣誕星可能是一顆超新星。P2
　　Some people think that the Start of Bethlehem could have been a supernova.

　　4、假定一個人掉進黑洞，他會認為很快就能到達黑洞中心。P3
　　If a man fell into a black hole, he would think that he reached the center of it very quickly.

　　5、只是在近幾年天文學家才開始具體研究黑洞。P3
　　It is only recently that astronomers have begun specific research into black holes.

　　6、另一方面，科學家們也在設想，由于有非常先進的技術，人們也許能在將來利用黑洞為人類服務。P5
　　On the other hand, scientists have suggested that every advanced technology could one day make use of the energy of black holes for mankind.