手持光源用英语怎么说

手持光源用英语可以翻译为 "handheld light source" 或 "portable light source."

来源：手持光源是指能够用手握住并携带的、可以发出光的装置，如手电筒、提灯、火把等。

英文例句及中文翻译：

I always keep a handheld light source with me in case of a power outage. (我总是随身携带一个手持光源，以防断电。)
The portable light source was very helpful when I had to fix my car at night. (在晚上修车时，这个手持光源非常有用。)
I like to go camping with a small, lightweight handheld light source. (我喜欢带一个小巧轻便的手持光源去露营。)