mindmap root((DI/DUP)) dichotomy 1、 A division into two often contradictory groups.
2、 Something with qualities that seem to contradict each other.
🌱Already in her first job, she noticed a dichotomy between the theories she'd been taught in college and the realities of professional life. 🌳In the modern world there's a dichotomy between fast and intense big-city life and the slower and more relaxed life in the country. But the dichotomy is nothing new: the Roman poet Horace was complaining about it in the 1st century B.C. Among other eternal dichotomies, there's the dichotomy between wealth and poverty, between the policies of the leading political parties, between a government's words and its actions—and between what would be most fun to do right this minute and what would be the mature and sensible alternative. dimorphic Occurring in two distinguishable forms （as of color or size）.
🌱One of a birder's challenges is identifying birds of the less colorful sex in dimorphic species. 🌳Dimorphism varies greatly in the animal kingdom. Among mammals, the male is generally larger than the female, but other differences in appearance tend to be modest. But birds are usually noticeably dimorphic, with the male being the more colorful sex; when we imagine a pheasant, a mallard, a cardinal, or a peacock, we're almost always picturing the male rather than the female. Among spiders the situation is often reversed. The golden orb-weaver spider, for example, is spectacularly dimorphic: the female may be 20 times the size of the male, and she usually ends up eating him, sometimes even while he's mating with her. Many sea creatures, including many fish, take care of gender problems by simply changing from one sex into the other. duplex 1、 Having two principal elements; double.
2、 Allowing electronic communication in two directions at the same time.
🌱The upper floor of their splendid duplex apartment had a panoramic view of Paradise Park. 🌳Duplex can describe a confusing variety of things, depending on the technical field. Most of us use it as a noun: a duplex can be either a two-family house or a two-story apartment. In computer science and telecommunications, duplex （or full-duplex） communication can go in both directions at once, while half-duplex communication can go only one way at a time. In other areas, just translate duplex as "double" and see if the sentence makes sense. duplicity Deception by pretending to feel and act one way while acting in another.
🌱By the time Jackie's duplicity in the whole matter had come to light, she had left town, leaving no forwarding address. 🌳The Greek god Zeus often resorted to duplicity to get what he wanted, and most of the time what he wanted was some woman. His duplicity usually involved a disguise: he appeared to Leda as a swan, and to Europa as a bull. Sometimes he had to be duplicitous to get around his wife, Hera. After he had had his way with Io and was about to get caught, he turned her into a cow to avoid Hera's anger.