The output of the laser is very stable, and the fluctuation of output power is less than 0.5% under long-time high-power operation.

激光器具有非常稳定的输出，在长时间运转条件下，输出功率波动小于0.5%。

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This article gets the following conclusion through the demonstration analysis: 1. In long time, the GDP fluctuation is the TFP fluctuation's Granger reason.

本文通过实证分析研究，得到如下结论：1、在长时期内，GDP波动是TF P波动的格兰杰原因。

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Under long time settlement foreign exchange system, enterprise ability is low in adjusting foreign exchange net cash, fluctuation of exchange rate result in a great loss of net cash.

在长期实行的结售汇制定下，企业调整外汇净头寸的能力非常差，汇率波动对净头寸造成的损失是巨大的。

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