One advantage of sticking with the current version: it's a known quantity, and plenty of review materials exist.

坚持考老版本SAT的好处是：我们对这个考试有充分的了解，市面上充盈着丰富的复习资料。

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This can be determined by directly measuring the temperature increase associated with the introduction of a known quantity of heat.

确定热容量的方法可以采用向其加入已知的热量，然后直接测量所引起的温度增加量。

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Hardly an inspiring way of choosing a candidate, but Republicans apparently like a known quantity.

FORBES: Bye Bye Beijing, Hello White House?

G. was such a known quantity, how on Earth is someone going to fill those shoes?

NPR: Lifestyle & Trends: Kanye West, 50 Cent Do Battle

By contrast, the PPI payments were, by the time of the Budget, very much a known quantity.

BBC: A welcome boost - unless you're a bank