difficult to obtain material 中文意思是什麼
difficult to obtain material
解釋
難于獲得的材料-
Barring a few exceptions, it is difficult to obtain large amounts of material of the free nuclear endosperm of plants for routine biochemical analysis.
除了個別例外,要獲得大量的植物游離胚孔材料,並用於日常的生化分析是困難的。
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