《文明4》科研计算公式

　　An example举例
　　I always seem to understand better with an example, so here's a basic one.
　　我好象总要举例才比较明白，来个简单的例子。
　　Say you want to research Code of Laws which has a base cost of 350 beakers, the mandatory requirement of Writing and the optional (meaning you must research one of them) requirements of (Priesthood or Currency).
　　假设你想研究律法（code of laws），它的基本成本是350烧杯，强制性前提是书写（writing），选择性前提（意为你要多选一）是祭伺（priesthood）或货币（currency）。
　　You know Writing and Priesthood
　　你掌握书写和祭伺。
　　You produce 37 net beakers per turn and 3 other civilizations know it out of 7 who started the map.
　　你的净烧杯为每回合37，并且，初始的7家文明中有3家已经掌握了。
　　You started on a standard map (1.4 modifier) at the monarch difficulty level (1.15 modifier) at epic game speed (1.5 modifier).
　　你用的标准地图（修正1.4）、难度君王（修正1.15）、游戏速度史诗（修正1.5）
　　Your cost would be:你的成本将是：
　　FLOOR (FLOOR (FLOOR (350 * 1.15) * 1.4) * 1.5)
　　下取整（下取整（下取整（350 * 1.15）*1.4）*1.5）
　　FLOOR (350 * 1.15) = 402
　　FLOOR (402 * 1.4) = 562
　　FLOOR (562 * 1.5) = 843
　　Total cost = 843 总成本843
　　The amount of beakers applied to code of laws would be:
　　投入律法的烧杯量应为：
　　FLOOR (FLOOR ((37 + 1) * (1 + RDDW (0.30 * 3 / 7))) * (1 + 0.2 * (0.2 * 0))
　　下取整（下取整（（37 + 1）*（1 + 取整（0.30 * 3 / 7）））*（1 + 0.2 *（0.2 * 0））
　　1 + RDDW (0.30 * 3 / 7) = 1.12
　　FLOOR (38 * 1.12) = 42
　　FLOOR (42 * 1.2) = 50
　　Beakers applied to Code of Laws/turn = 50每回合投入律法的烧杯量 ＝ 50

　　Note that having Writing AND Priesthood only gives you a bonus modifier of 1.2 because you must have at LEAST Writing PLUS one of the optional prerequisites to be able to research Code of Laws. If you also had Currency, then the modifier would be 1.4.
　　注意掌握书写和祭伺只得到1.2的修正，因为你必须掌握书写和至少一项选择性前提才能开始研究律法。如果同时掌握货币，则修正值应为1.4。
　　Overflow
　　The overflow is calculated by the modifiers from the PREVIOUS Technology. Therefore, if you finished researching Writing this turn, and you had all THREE optional requirements, the overflow beakers which applied to your next technology would be equal to however many you had left USING THE MODIFIERS FOR Writing after finishing Writing. So, your Requirements modifier would be 1.6 (1.2 * 3). So, you could conceivable get a significant boost toward your next tech OVER WHAT YOU SHOULD HAVE GOTTEN if you have a lot of overflow.
　　盈余
　　盈余是基于上一个科技，通过修正计算得出。因此，如果玩家本回合完成书写的研究，并满足全部三项选择性前提，盈余、且会用于下一项科研的烧杯量将等于研究书写完成时剩余的、经过研究书写修正的烧杯数，不论此数是多少。这里，玩家的前提修正应为1.6（1.2*3）。因此玩家可以设想，如果有好多盈余，下一项科研就比理应获得的速度得到明显的提高。