In the system, the data acquisition task was done by a lower level computer, and only when the value of a signal was "obviously changed", data transfer was proceeded.

由此构成的下位机数据采集系统，只有当采集信号有明显变化时，才将相关数据向上位机传送。

youdao

Microsoft shareholders are likely to be less enthusiastic: integrating the two companies would be a mammoth task, and Microsoft has never made an acquisition on anything approaching this scale before.

ECONOMIST: Microsoft's bid for Yahoo!