First keep these in mind before I explain it: "Cascade" means 'waterfall' so keep in mind something falling. "turbulent" means 'moving fast and violently' "squall" usually means a loud harsh cry but in this sentence it means something like a violent windstorm. "devil dust" is 'swirling wind' you know the ones like desert storms. "Errors and uncertinities" here means mistakes "multiply" means 'more and more' or 'increase' in size or shape "continent" means 'a very huge piece of land' ' " Features" means form / appearance / style Okay now I'll try to explain this sentence... Mistakes and doubts become more and more by increasing through combining with each other forming a chain that falls just like a waterfall, yet it flows upwards like a windstorm and grows in size so big as a huge piece of land that can be seen only through satellites. I really hope my explaination helps in understanding this sentence.

For those who do not know, he asked for an explanation in chinese.

This is from James Gleick's description of how chaos theory works, in relation to the weather for example. He describes how many tiny inconsistencies and errors (eg. a butterfly beating its wings, thus the nickname for this theory) can build up, increase and become stronger as a group until it all affects a larger pattern, such as weather movements. Nour has given a good description of the imagery, and yes cascades do travel downwards. :) Gleick uses the phrase "cascading upward" to show how it can increase, grow and have a linked force (like a chain). The "turbulent features" are the original errors and inconsistencies, which still clash against each other but as a group, creates its own power.