您要查找的是不是：
- 重心加速度制御Acceleration control of the center of mass
- 头部重心运动轨迹Head C.G. trajectory
- 头部head
- 重心center of gravity
- 工作重心focus of work
- 合成加速度resultant acceleration
- 头盔可以保护你的头部免受伤害。A helmet guards your head against/from injuries.
- 切向加速度tangential acceleration
- 他是一个被击中头部而变痴呆的拳击手，故只好以擦鞋为生。He was a punch-drunk boxer who made his living shining shoes.
- 重心的centrobaric
- 法向加速度vertical acceleration
- 医生缝合了他头部的伤口。The doctor stitched the cut on his head.
- 加速度瞬心instantaneous center of acceleration
- 头部的cephalic
- 重心不稳造成身体的滑倒。he blamed his slip on the ice; the jolt caused many slips and a few spills.
- 切线[切向]加速度tangental acceleration
- 外科医生把他受伤的头部包扎起来。The surgeon bandaged up his injured head.
- 由于连接两物块的绳子无伸缩性，因此它们的加速度相同。Since the cord connecting the two blocks is inextensible, the accelerations are the same.
- 重心低的载重型卡车会平稳行驶。A heavy truck with a low center of gravity will hug the road.
- 面罩附于妇女的帽子或头巾上的一段网状物，穿戴起来用作装饰或保护头部或脸部A length of netting attached to a woman's hat or headdress, worn for decoration or to protect the head and face.
