《梁书·列传·卷五十》
因此白丝不会长久保持洁白，有时变成玄，有时染成黄；鲍鱼发臭，兰芝芳香，进入这环境就自然会发生改变。
是以素丝无恒，玄黄代起；鲍鱼芳兰，入而自变。
In this case, white silk will not remain clean for long, and sometimes becomes black, and sometimes turns yellow; and in the environment of stink of abalone and fragrance of orchids, the changes occur naturally.
<s>[INST] Kindly elucidate the central themes in this passage in English: 是以素丝无恒，玄黄代起；鲍鱼芳兰，入而自变。 [/INST] In this case, white silk will not remain clean for long, and sometimes becomes black, and sometimes turns yellow; and in the environment of stink of abalone and fragrance of orchids, the changes occur naturally.</s>
Kindly elucidate the central themes in this passage in English: 是以素丝无恒，玄黄代起；鲍鱼芳兰，入而自变。
user
In this case, white silk will not remain clean for long, and sometimes becomes black, and sometimes turns yellow; and in the environment of stink of abalone and fragrance of orchids, the changes occur naturally.
assistant