pinprick
noun [ C usually plural ] uk/ˈpɪn.prɪk/ us/ˈpɪn.prɪk/
(HOLE/PAIN)
针刺孔，小孔;（针等物体刺入皮肤时所造成的）刺痛感
a very small hole in something where a pin or needle has been pushed into it, or a sudden pain where a pin or needle has been pushed into your skin
There was a pinprick on his arm. 他的左臂有一个针孔。
(SMALL AMOUNT)
极少量（尤指轻的某物）
a very small amount of something, especially light
The darkness was broken by the odd pinprick of light. 奇怪的少许亮光打破了黑暗。
(PROBLEM)
小烦恼
something that is slightly annoying for a short time
You have to ignore the pinpricks and just get on with the job. 你必须放下那些烦心小事，只管继续工作。