An alternative approach is to activate the virus directly, rather than activating the cell it is living in.

另一种替代方法是直接激活病毒，而不是激活病毒所驻留的细胞。

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One type of brain cell in the arcuate produces chemicals that activate the appetite. Another type makes appetite-quashing molecules.

一类弓状核的脑细胞产生引发食欲的分子，另一类则产生抑制食欲的分子。

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In some cases the specific change triggers a signal - the folded or square position may activate some other enzyme, or open a channel in a cell.

在某些情况下特别的变化能触发一个信号——折叠的或方形的状态将激活一些其他的酶，或在细胞中打开一个通道。

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But first,Mister Venter said, they had to de-activate a gene in the receiving cell that would have killed the synthetic genome.

VOA: special.2010.07.20

The cell is then given a jolt of electricity to activate cell division, basically tricking the cell into doing what a fertilized egg would normally do.

CNN: Cloning experts to tell House committee pros, cons

Only if all five are found at the right levels does the circuit activate, producing a protein that causes the cell to destroy itself.

ECONOMIST: DNA computing

With only the genetic material from the person to be cloned inside the shell of the egg, the cell would be jolted with electricity to activate cell division.

CNN: Group says it will move human cloning work offshore