"There are some general principles, but there are also huge numbers of exceptions and variations. They are living things, so they are very hard to reduce to a common denominator. Perhaps their very diversity is what they have in common," says Yen Sheng-hung.
「有通則，但例外、變化卻常發生，它們是活生生的生命，很難歸納一個模式，或許如此多樣性，就是它們的模式」，顏聖紘說。