up-to symbol

基本解釋

The mouth of the river was beginning to silt up—a powerful symbol of over-exploitation.
墨累-達令的河口開始被泥沙淤塞，這是過度開發(fā)的有力信號。
An up-and-down arrow symbol next to your task property name, in this example Task Name, means that you can sort your tasks by this propertya ?s value.
任務屬性名（這個示例中的 Task Name）旁邊的上下箭頭符號表示可以按該屬性值對任務進行排序。
The seamless integration of terrain, overground and underground entities is the principal symbol of up-to-date 3DGIS, and the seamless integrated spatial modeling has been an urgent demand.
地上下無縫集成三維建模是新一代3DGIS的主要標志，地上下無縫集成建模已成為當務之急。

Basically they merged with Desi TV, a publicly traded company (that couldn't dig up even a little info on), swapped the ticker symbol to XRMB, and started trading on the Over-The-Counter Bulletin Board securities market.
ENGADGET: Watch out: Xero merges, now a publicly traded company