Most of the victims had close contact with sick birds, but health officials worry the virus could acquire the ability to move easily among people, sparking a pandemic.

大多数受害者都有与患病家禽的密切接触史，但是卫生官员担心病毒会获得在人与人之间传染的能力，从而导致大范围流行。

youdao

It expounds how to use non-contact switch to stop the short circuit of the electric apparatus and lamp circuits etc. from sparking, and shows experimental and practical parameters.

阐明了如何使用无触点开关来防止电器线路及灯具等短路产生的火花，并给出了实验和实用参数。

youdao

When one board is pressed against the other, the wires make contact, sparking an explosion.

WSJ: Meanwhile, in the War in Afghanistan...