1) to raise the rent step by step
逐步提高房租
2) scaled test
难度逐步提高的测验
3) gradually increase payment for labour
逐步提高劳动报酬
4) heavy rent
高额房租
5) lifting step by step
逐步抬高
6) sequential extraction method
逐步提取法
1.
The soil polluted by heavy-metal was selected as the soil samples and added NaOH solution,CaO solid,Na2S solution,Na2CO3 solid, C9H7NO solution,and different chemical forms of Pb were extracted with sequential extraction method.
以被重金属污染的农田土壤为样品,分别加入NaOH溶液、CaO固体、Na2S溶液、Na2CO3固体、C9H7NO溶液作为改良剂,采用逐步提取法对土壤中重金属Pb的相态进行浸提和萃取,采用原子吸收光谱法测定提取液中每种形态铅的浓度;最后分析了土壤中Pb在不同的实验环境下的含量。
补充资料：逐步
1.随着步履。 2.一步一步地。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条