flow up

• 向上流动

flow up的用法和样例：

例句

1. As the plates separate, hot molten mantle material flows up to fill the void.
   随着板块的分开，炽热的熔融地幔物质向上流动，以填充空隙。
2. But black upward mobility consists largely of people from poor families moving up.
   但是黑人在社会阶层上的向上流动大多都限于摆脱贫困的状态。