“Süs hayvanları buz ile serinletiliyor” http://haberajans.co/sus-hayvanlari-buz-ile-serinletiliyor/
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The different research trees require a wide span of speed ups. The research time varies from a few minutes to many days.
In order to waste as little speed ups as possible, you can prepare your speed ups to fit the expected timeframes in the research tree. 69 more words