... on second thoughts 经沉旧斟酌 on the contrary 反相正 on the grounds of 依据,以...为由 ...
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通常监测工作通过一定的测试通道来完成，测试通道中的不同混频方式直接决定了测试相位值的正相或反相。
Usually the monitoring is accomplished wi th certain testing channel. Different mixing modes in the testing channel directly decide that the tested phase value is positive or negative.
该键合相合成方法简单，性能稳定，适用于正相和反相液相色谱。
The new chiral stationary phase is stable and suitable to both normal phase and reversed phase chromatography.
方法利用正相、反相硅胶柱和大孔树脂柱色谱分离，并通过波谱技术进行结构鉴定。
Methods The compounds were isolated by silica gel, ODS, and macroporous resin column chromatography and their structures were determined by means of spectral analysis.
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