tree pollen造句

But seed orchards are difficult to control , because tree pollen spreads so far that alien , non - elite trees almost inevitably muddy the gene pool
但是有种子的果树很难控制，因为花粉传播的太远了，一些其它种类的树木就会不可避免地弄乱此基因库。
Surface - enhanced raman spectra are presented for tree pollen ( cottonwood and redwood pollen ) and a bacterium ( escherichia coli ) , and the e . coli spectra are compared with results obtained from the literature and with results obtained previously by mixing various concentrations of the bioanalyte with the silver colloid
增加表面积后之拉曼光谱发现于树花粉(棉白杨及红杉)及一种细菌(大肠杆菌) ，将大肠杆菌之光谱与文献中及一系列混和浓度之光谱进行比较。
It's difficult to find tree pollen in a sentence. 用tree pollen造句挺难的