The labeling substance is unevenly distributed through the crown of the marked trees . 标记物质不能均匀地分布于标记树的整个树冠上。
2.
Uniformly labeled substances 均匀标志物质
3.
The permeation of mps into superficial tissue was demonstrated using a radioactive labeled substance as well as chemical - analytical and histochemical methods 用放射活性标记物质、化学分析和组织化学法证实mps (多磺酸粘多糖）能渗透入浅表组织。
