adj.無臟污的；無污點(diǎn)的

Studies On Soilless Culture of Chrysanthemum. 菊花無土栽培研究。

Studies on Soilless Substrates Used in Pot Cyclamen Production. 仙客來盆花溫室規(guī)模化生產(chǎn)栽培基質(zhì)篩選的研究。

What are the advantages and disadvantages of soilless culture? 無土栽培有什么優(yōu)缺點(diǎn)？

Please discuss the advantages and disadvantages of soilless culture? 請結(jié)合實(shí)際談?wù)劅o土栽培有什么優(yōu)點(diǎn)和缺點(diǎn)。

The people here use soilless cultivation methods to grow vegetables. 人們采用無土栽培的方法來種植蔬菜。

The theoretical basis of soilless culture is the theory of mineral nutrition . 無土栽培是以礦質(zhì)營養(yǎng)學(xué)說為理論基礎(chǔ)的，該學(xué)說的核心內(nèi)容為。