过了一段时间，蛀坏的部分会蔓延至内牙的神经和血管。
After a while, the decay reaches the nerves and blood vessels of the inner tooth.
12周：1845年，马铃薯枯萎病用了12周时间从佛兰德斯蔓延到爱尔兰。
WEEKS: Time it took for the potato blight to spread from Flanders to Ireland in 1845.
Macksoud打赌，随着时间的推移，他所观察到的成本意识将会继续蔓延。
Macksoud is betting that, over time, the cost consciousness he's seeing continues to spread.
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