We have received sporadic complaints about late deliveries from customers in the southern region.

我們陸續零星接到南部地區客戶對延遲送貨的抱怨。

The office Wi-Fi has been sporadic all morning, so please save your files often.

辦公室的無線網路整個早上時斷時續，請大家經常存檔。

Sales were sporadic during the first quarter, but they picked up after the spring promotion.

第一季的銷售零零星星，但春季促銷後就回升了。