To study the transmission of painful signals throughout the body, many researchers use "marker" proteins that label pain-sensing neurons.

为了研究疼痛信号传输至全身各处，许多研究人员使用“标记”蛋白质，标签感受疼痛的神经。

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Take 3 COINS (or tokens or buttons, but really, COINS are best) and label them 1-30 with a washable magic marker.

取30个硬币(代币或钮扣都行，但说实话，硬币最好)，然后用魔笔在上面分别标上1 - 30。

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You can write on it with marker, or print a special label out of your computer. You can even give it a special cover too!

你可以用彩笔写字、用电脑印一个特别的标识，甚至做一个别开生面的CD套。

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