Although the photoelectron spectrum contains the information of the number of pulses, an unambiguous determination of the number of attosecond pulses requires additional evidence.

虽然阿秒脉冲光谱中包含有脉冲个数的信息，但要想确定阿秒序列中脉冲的个数还需要更多的证明。

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Single isolated attosecond (as) extreme ultraviolet (XUV) pulses can be generated via the nonlinear optical interaction between intense few-cycle laser fields and noble gas atoms.

通过脉宽为周期量级的超快强场激光脉冲与惰性气体原子的极端非线性相互作用，能够产生单个的阿秒量级的极端远紫外光脉冲。

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