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题库 / Prep2007E2-SC-138
A middleweight black hole weighs in at roughly 500 solar masses, hundreds of times more massive than the lightweight black holes produced by the collapse of individual stars, but thousands or even millions of times less in its mass as the heavyweight giants that lurk in the centers of galaxies.
thousands or even millions of times less in its mass as
it is thousands or even millions of times less massive as
thousands or even millions of times less massive than
yet it is thousands or even millions times less massive than
yet it is thousands or even millions of times less in its mass than
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but、yet都是并列连词，不可以同时使用
weigh a number，重多少，如：
She weighs 60 kilos. 她体重为60公斤。
weigh in (at a number/sth)，测体重是多少，如：
Both boxers weighed in at several pounds below the limit. 两个拳击手赛前量的体重都比规定限度少几磅。
A middleweight black hole weighs in at roughly 500 solar masses, 中型黑洞重500个太阳的质量。
but adv.不过; 只是; 只; 另一方面;
But 平行标志，多方面描述同一个事物—找平行！