Damages caused by debris flow head impact on structure are very grave ones among many debris flow damages.

在泥石流所带来的诸多灾害中，泥石流龙头冲击建筑物造成的危害是非常突出的。

youdao

Head of the International Red Cross Federation's Influenza team, Robert Kaufman, says the impact of a novel virus on a community without immunity is not just about the number of illnesses and deaths.

VOA: standard.2009.09.04

In many instances the head impact doses and head injury risks while wearing vintage leatherheads were comparable to or better than those while wearing several widely used 21st century varsity helmets.

FORBES: Your Football-Playing Kids May As Well Be Wearing Leather Helmets

Reebok and mc10 have collaborated to create CheckLight, a head impact indicator meant to make it easy to see when an athlete has taken a dangerous blow to the head.

ENGADGET

Ridell started experimenting with them back in 2006 or so (See this article from MIT Technology Review) and a New Hampshire company called Simbex sells something called the Head Impact Telemetry system (HIT system get it, get it?) which would allow the NFL to start in right away.

FORBES: A Better Solution to the NFL's Concussion Problem