What is more, the high beam quality must be preserved throughout the compression, acceleration and focusing stages.
更难的是，在整个压缩、加速和聚焦阶段中，射束必须一直保持在这样的高品质。
What is more, the high beam quality must be preserved throughout the compression, acceleration and focusing stages.
更难的是，在整个压缩、加速和聚焦阶段中，射束必须一直保持在这样的高品质。
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