extensive sampling 中文意思是什麼
extensive sampling
解釋
廣面抽樣-
Based on extensive field observation and population sampling in 71 populations of 20 provinces, this dissertation investigates morphology, ecology, cytology, cytogeography and its sequences of this complex. the results show that a. ageratoides polyploid complex might be originated in northeastern china, from which it migrated along three different routes
本研究基於對我國20個省、市、自治區43個地點71個三脈紫菀復合體居群的野外觀察和採集，從形態學、生態學、細胞學、細胞地理學和分子生物學等各方面，對三脈紫菀多倍體復合體進行了綜合性研究。 -
Extensive experiment on tar cracking was performed on bench - scale tar catalytic cracking test system in itpe. cold trapping was used for tar sampling and gravimetric analysis of tar samples was performed to achieve tar content in flue gas
在分析該領域研究現狀的基礎上，建立了實驗室規模生物質氣化焦油催化裂解實驗系統，採用冷態捕集方法進行焦油取樣，採用重度分析方法對焦油樣品進行分析以確定煤氣中焦油含量。
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