This means that they do not have enough red blood cells. Normally, the fetus stores iron during the latter months of pregnancy and uses it after birth to make red blood cells. Infants born too soon may not have had enough time to store iron. Loss of blood from frequent blood tests also can contribute to anemia.
The genre of the Time Machine was science fiction. The theme of the Time Machine was that time is a valuable thing and to not take it for granted. As the time traveler discusses the possibility that time is the 4th dimension he provides a miniature model of the time machine that vanishes in front of his guests eyes.
Some items have a time gate and limit the number of times an item can be crafted in a period of time. This is usually for high level crafting materials like ectoplasm refinement. The purpose of time gating is to make crafting valuable for players who have invested into crafting. All items have a limit of one per day (daily), which reset at 0:00 UTC like other daily activities.