Mutual movable double laser Head processing is more efficient than single-Head cutting macHine.

选用双激光头互移加工，较单头切割效率更高。

youdao

He was knocked out by a single blow to the head.

他头上只被打了一下便昏过去了。

《牛津词典》

Simplicity: the code is more efficient and compact by using the single head element or type definition to select a group of elements.

简单性：通过使用单个head元素或类型定义来选择一组元素，使代码更加紧凑高效。

youdao

Each hair on a person's head grows from a single tube-like hole in the skin called a follicle.

VOA: special.2011.04.05

Yet Sony turned that perception on its head almost single-handedly, with a couple of world-beating products and a well-defined brand.

BBC: Chinese New Year can help Beijing sell 'brand China'

Emergency services treated the injured at the scene, including the driver of the single-decker bus who suffered a minor head wound.

BBC: Schoolchildren hurt as two buses crash in Salford

The Cleburne County Sheriff's Office said in a news release that McCready was found dead at a residence in Heber Springs from what appears to be a single, self-inflicted gunshot to the head.

NPR: Singer Mindy McCready Dies In Apparent Suicide