毕赤酵母表达系统是目前最为成功的外源蛋白表达系统之一。
The Pichia pastoris is one of the most successful foreign protein expression system until now.
这些质粒可用于外源基因在酵母中表达的研究。
These plasmids can be used in the study of foreign gene expression in yeast.
另一类是外源因素，即他人的评价与态度。
Another kind is a factor of other source, namely others' appraisal and attitude.
除菌源量外，气候条件也是发病的重要因素。
Besides the pathogen amount, the climate was also the important factor to the disease occurrence.
除菌源量外，气候条件也是发病的重要因素。
Besides the pathogen amount, the climate was also the important factor to the disease occurrence.
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