is however such that是固定短语吗? 这种设备的原理什么的,我不清楚,但句子比较简单,is however such that 不是固定短语。 typical volumetric liquid productivity is however 很典型的主系表结构,is however是说不管是什么、不管起什么作用的意思。后边such that 引导从句作补语,表示只要能达到或起到后面所讲的作用或目的就ok. such that the superficial liquid velocity is well below 1 mm/s, which ensures operation far from the trickle flow-pulsed flow transition. 查看更多