Odour material action at smell cell, generation nerve impulse is conducted via olfactory nerve, reach the smell center of pallium finally, form smell.

气味物质作用于嗅细胞，产生神经冲动经嗅神经传导，最后到达大脑皮层的嗅中枢，形成嗅觉。

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The reason is that translation is also characterized by art, which includes form expression, allomerism and artistic impulse.

翻译的艺术性至少包括三个方面的内容，即形式表现、异质同构和艺术冲动。

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And it has functions of outputting different analog signals, impulse signal with different frequency, amplitude and different wave form.

同时具有输出各种模拟信号、不同频率和幅值的脉冲信号及各种波形信号的信号源功能。

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And if the person doesn't resist that impulse, you have to have some form of legal authority to make sure that they're not infectious during their travel back to the United States.

NPR: Man Eluded Attempts to Control Deadly TB Strain