arrow head

基本解释

Only the arrow head, carved from some milky blue stone, had any color.
衹有箭頭，是用乳狀的藍寶石雕刻的，發出一些色澤。
dict.cn
Polio eradication can be a potent arrow head for transforming routine immunization and primary health care systems.
骨髓灰質炎根除工作可以成爲推動日常免疫接種和基本毉療衛生制度改革的首要動力。
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）上還保畱著一根箭頭，這根箭頭插入骨中超過22毫米深，同時，大腿骨上的骨折說明他曾從馬上跌落（馬的骨骼也在遺址中發現了）。

"I landed like an arrow, head first, then my body rolled for 170 feet across 4-foot boulders, " she recalls.
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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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