By using this program, the performances of single cone bits with different structures under various drilling conditions can be compared and evaluated.

采用该仿真程序可对不同钻井条件下不同结构单牙轮钻头的性能作出比较和判定，也可预计尚未制成钻头的钻进能力。

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The team took electrical readings from single isolated retinal horizontal cells. They found that light caused a change in electrical current in cone horizontal cells but not in rod horizontal cells.

研究小组对单个视网膜水平细胞进行了电子扫描，发现光引起了锥状细胞中电流的变化，而在柱状细胞中则无此反应。

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A similar process occurs on a much smaller scale to gas surrounding a single star, forming the bow-shaped arc seen near the upper left side of the Cone.

类似的过程以小得多的规模发生在锥状星云左上方的一个恒星周围，形成了一个弧形光晕。

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Bomb-sniffing dogs were working the area of the bombings and nearby streets, checking every single item on curbs or near the street -- including "every construction cone, every Port-a-Jon" -- to make sure there were no explosive devices left, CNN affiliate WHDH in Boston reported.

CNN: FBI to take lead in investigating Boston Marathon bombings