由于红细胞增多可能需要降低剂量或停止治疗，故应在开始治疗前、初始治疗后的3 ~ 6个月以及随后的每年检测红细胞比积。
Because polycythemia may require dose reductions or discontinuation of therapy, hematocrit should be obtained at baseline, 3 to 6 months after initiation of therapy, and annually thereafter.
由于罗茨泵是一种无内压缩的真空泵，通常压缩比很低，故高、中真空泵需要前级泵。
As the Roots pump is a non-vacuum inside the compression, the compression ratio is usually very low, so high, medium and vacuum pumps need to pump before.
因为每台激光胶片打印设备未校准前的输出误差固定，故首先提出了一种简捷的激光成像校准算法，然后进行了软件和硬件电路的设计。
Based on the fixed errors of laser film printer, the paper gives one easy and simple calibrations arithmetic and sets up a way to achieve it by software and hardware circuit.
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