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词语针头拆分为汉字：
针字的拼音、笔画、偏旁部首、笔顺、繁体字，针字字源来历，针字演变
缝织衣物引线用的一种细长的工具：～线。细长像针的东西：时～。用针扎治病：～灸。注射用的器具和药物：～头。……
头字的拼音、笔画、偏旁部首、笔顺、繁体字，头字字源来历，头字演变
1. 头 [tóu]2. 头 [tou]头 [tóu]人身体的最上部分或动物身体的最前的部分：～骨。～脑。～脸（ａ．头和脸；ｂ．指面貌；ｃ．指面子，体面）。～角（jiǎo ）（喻青年的气概或才华）。指头发或所留头发的样式：留～。剃～。物体的……
汉语拼音：zhēn tóu
Each part of him is either punctured by a needle or attached to an instrument.
他身体的各个部分不是插着针头就是跟仪器连着。She took a needle and pricked me in such a way that it appeared that she was not testing my blood, but was sewing a shoe sole instead.
天呀，她拿起个针头就狠劲地往下戳，简直不像在抽血做化验，而是在锥鞋底呢。Volcanic rocks (along with other types) often contain small, deep holes, as if they had been repeatedly punctured with a needle.
火山岩（以及其他类型）通常包含小，深洞，如果他们曾多次用针头刺破。Bob's on the table, and we take this sort of small needle, you know, not too big.
鲍勃在手术台上，我们用这种小针头，你知道的，不是特别大的。I had a blood test done yesterday and I'm deathly afraid of needles. The last thing I need is to have yet more stuck into my body.
喂别开玩笑了，昨天我光是去验血时看到针头就怕的要死了，你还要把一堆这玩意插在我的身上，你是想谋杀吗？The tapered plug or "needle" is screwed in or out of a mating orifice in the body and thus controls the effective orifice size.
其锥形插头或“针头”是阀体上配置的螺纹旋进旋出的节流道，因此能够有效控制节流面积。And hypodermic needles do not even deliver vaccines to the best place in the body.
而皮下注射所用的针头甚至都不能把疫苗送到身体最合适的部位。Good job! Some of you will get a vaccination that looks like this. There's no needle - it's a spray that goes into your nose.
好样的！你们还有人会像这样接种疫苗。没有针头——它是一种喷雾剂，通过你的鼻子进入。Every library should try to be complete on something, if it were only the history of pinheads.
每一个图书馆都应该努力使某一方面（的图书）齐全，那怕只是针头的历史也好。