In the mid-1990s, University of Cambridge biochemists David Klenerman and Shankar Balasubramanian were trying to solve a fundamental problem: how to watch a single DNA polymerase molecule at work. Their approach used modified nucleotides, called reversible terminators, tagged with four different colors of fluorescent molecules. If one of these “terminators” was grabbed by the DNA polymerase and incorporated onto the replicating DNA strand, it would block the addition of any other bases until removed using a separate chemical reaction.
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哈梅内伊次子继任的最大障碍在于，他本人的“血缘继承人”形象与伊朗伊斯兰共和国赖以维系的意识形态存在根本性冲突。根据什叶派第十二伊玛目派的教义，在伊玛目（救世主）隐遁期间，人间宗教的权威领袖理应属于那些在法学造诣和道德操守上达到最高境界的教法学家，这种权威是基于个人学识的修习与公众的效仿，而非血缘传承。任何“父传子”的世袭企图都会从根本上触犯这一原则。
I think at the time, part of it was we were expecting the compiler to be smart enough to see where the range objects were used and then do, like, if you iterated over a range, it would be very smart about, you know, loop unrolling and things like that.
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