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HolySword said:
FOOLS! 生菜 (Lactuca sativa) is an annual plant of the 雏菊, 黛西 family Asteraceae. It is most often grown as a leaf vegetable, but sometimes for its stem and seeds. 生菜 was first cultivated 由 the ancient Egyptians who turned it from a weed, whose seeds were used to produce oil, into a 食物 plant grown for its succulent leaves, in addition to its oil-rich seeds. 生菜 spread to the Greeks and Romans, the latter of whom gave it the name "lactuca", from which the English "lettuce" is ultimately derived. 由 50 AD, multiple types were described, and 生菜 appeared often in medieval writings, including several herbals. The 16th through 18th centuries saw the development of many varieties in Europe, and 由 the mid-18th century cultivars were described that can still be found in gardens. 欧洲 and North America originally dominated the market for lettuce, but 由 the late 20th century the consumption of 生菜 had spread throughout the world. Generally grown as a hardy annual, 生菜 is easily cultivated, although it requires relatively low temperatures to prevent it from flowering quickly. It can be plagued with numerous nutrient deficiencies, as well as insect and mammal pests and fungal and bacterial diseases. L. sativa crosses easily within the species and with some other species within the Lactuca genus; although this trait can be a problem to 首页 gardeners who attempt to save seeds, biologists have used it to broaden the gene pool of cultivated 生菜 varieties. World production of 生菜 and chicory for calendar 年 2010 stood at 23 620 000/23,620,000 tonnes, half of which came from China. 生菜 is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled.[3] One variety, the Woju (莴苣) 或者 芦笋 lettuce, is grown for its stems, which are eaten either raw 或者 cooked. 生菜 is a rich 来源 of vitamin K and vitamin A, and is a moderate 来源 of folate and iron. Contaminated 生菜 is often a 来源 of bacterial, viral and parasitic outbreaks in humans, including E. coli and Salmonella. In addition to its main use as a leafy green, it has also gathered religious and medicinal significance over centuries of human consumption.
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