drop head

基本解釋

Slowly drop your head forward, letting the weight of the head gently stretch your neck.
慢慢地把頭朝前低下，讓頭部重量輕輕地拉緊脖子。
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Slowly drop your head to the left, trying to touch your left ear to your left shoulder.
慢慢地把頭偏向左邊，試著讓左耳接觸左肩膀。
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The photoelectric liquid drop sensor(PLDS) is based on the optical fibers positioned inside the drop and the special capacitive sensor composed of the drop head and a cylindrical ring plate.
介紹一種用于液體特性研究的光電液滴傳感器（PLDS），其原理是基于插入液滴內(nèi)部的光纖，及由滴頭和環(huán)形極板構(gòu)成的電容傳感器。

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