arrow head

基本解释

Only the arrow head, carved from some milky blue stone, had any color.
只有箭头，是用乳状的蓝宝石雕刻的，发出一些色泽。
dict.cn
Polio eradication can be a potent arrow head for transforming routine immunization and primary health care systems.
骨髓灰质炎根除工作可以成为推动日常免疫接种和基本医疗卫生制度改革的首要动力。
One humerus (upper arm) bone contained an arrow head embedded more than 22mm into the bone, while a thigh bone fracture suggests a fall from a horse (horse bones were also found at the site).
一根肱骨（上臂骨）上还保留着一根箭头，这根箭头插入骨中超过22毫米深，同时，大腿骨上的骨折说明他曾从马上跌落（马的骨骼也在遗址中发现了）。

"I landed like an arrow, head first, then my body rolled for 170 feet across 4-foot boulders, " she recalls.
FORBES: Magazine Article
But what did they expect — that Franken would, after a grueling campaign and a grinding eight-month legal process, ride into town with a prop arrow through his head, honking a bicycle horn like Harpo Marx?
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You'll see the arrow pointing on a map where to go, but if you turn your head, that arrow doesn't swivel around to stay pointed in the right direction.
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