A back-of-the envelope calculation suggests China may have accounted for as much as 2 percentage points of annualised growth in inflation-adjusted world output in the second quarter of 2009.
根据粗略计算，2009年第二季度，中国可能为经通胀调整、折合成年率计算的全球产出增幅贡献了高达两个百分点。
The envelope of output optical signal after the phase modulator keeps stable and the optical signal can be used to carry uplink data back to the base-station.
在经过光相位调制器之后，输出光信号的包络保持不变，能被基站用来承载强度调制的上行信号。
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