up-to symbol

基本解释

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 propertyâ ™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爲儅務之急。

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