complex

• complex ['include (many different things)', from com- + plectere 'to weave, braid'] braid(编成辫子 =plait)
• duplex [duo 'two' + plex 'fold'] 有两部分的; 毗联式建筑
• multiplex [multi- (multiple) + -plex '-fold'] 有很多部分的; 多种形式的
• perplex [ 'twisted together']

《红楼梦》第六回：竟如乱麻一般，并无个头绪可作纲领。

The term "Gordian knot," commonly used to describe a complex or unsolvable problem, can be traced back to a legendary chapter in the life of Alexander the Great [亚历山大大帝]. As the story goes, in 333 B.C. the Macedonian conqueror marched his army into the Phrygian capital of Gordium in modern day Turkey. Upon arriving in the city, he encountered an ancient wagon, its yoke tied with what one Roman historian later described as "several knots all so tightly entangled that it was impossible to see how they were fastened..." [link]

“快刀斩乱麻”或原为“快刀斩乱丝”：方储为郎中，章帝使文郎居左，武郎居右，储正位中。曰：“臣文武兼备，在所施用。”上嘉其才，以繁乱丝付储使理，储拔佩刀而断之，曰：“反经任势，临事宜然。” 方储（？—93）东汉官员、学者，章帝建初年间举贤良方正。

Complex commonly refers to:

• Complexity, the behaviour of a system whose components interact in multiple ways so possible interactions are difficult to describe
• Complex system, a system composed of many components which may interact with each other
• Complex (psychology), a core pattern of emotions etc. in the personal unconscious organized around a common theme such as power or status
• Exosome complex, a multi-protein intracellular complex 胞外体复合体，一种多蛋白胞内(intra+cell+ular)复合体
• Protein complex, a group of two or more associated polypeptide chains 两条或更多相关的多肽链组成的一组 Poly- is used to form adjectives and nouns which indicate that many things or types of something are involved in something.
• Species complex, a cluster of very similar species difficult to delimit
• Coordination complex, a central atom or ion and a surrounding array of bound molecules or ions 配位络合物、中心原子或离子以及周围的结合分子或离子阵列
• Complex number, an extension of real numbers obtained by adjoining imaginary numbers i²和(-i)²都是-1。
• Complex analysis, the study of functions of complex numbers
• Complex (geology), a unit of rocks composed of rocks of two or three types
• Complex crater, a type of large impact crater morphology
• Complex volcano, a volcano of mixed form
• Building complex, a group of inter-related buildings
• ...

In electronics, a multiplexer (or mux; spelled sometimes as multiplexor), also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. The selection is directed by a separate set of digital inputs known as select lines. A multiplexer of 2ⁿ inputs has n select lines, which are used to select which input line to send to the output.

What is Multiplexer, How it works & Multiplexer Circuit

Chapter 6. I/O Multiplexing: The select and poll Functions

六级/考研单词: weave, fold, multiple, perplex, twist, knot, trace, legend, conquer, march, turkey, encounter, wagon, fasten, component, interact, compose, psychology, cluster, coordinate, atom, array, bind, molecule, geology, volcano, electron, data, digit